If you’re like most people, you probably think the gateway to the entire web is Google. However, Google uses a web crawler to find site content to offer you when you search for certain topics. That web crawler can only find web pages. It can’t find the invisible web – the collection of data and information houses behind deep web search engines and database query forms.

What Is the Invisible Web?

The web is like an onion. There are many layers, almost like the Earth. The top “surface” level of that large “internet” planet is all the sites that search engines crawl and index. These are what you typically find in normal search results. However, there are deeper layers of the web, accessible through sites other than normal search engines.

  • Deep Web: Databases and programs users need to interact with to pull content and other information from underlying databases.
  • Dark Web: Requires a specialized web browser that directly accesses websites on an “alternate” internet, using direct addressing of the servers and sites. Typically used for illicit or illegal content.
  • Invisible Web: The invisible web is an alternative name for the Deep Web. It’s called “invisible” because search engines can’t access that information.

How can you explore the “invisible web”? The truth is, you need to know which sites contain the query engine for those underlying databases. In this article, you’ll learn about some of the largest ones and what kind of information you can find there.

The Best Deep Web Search Engines

The following is a quick list of the best deep web search engines that we’ll cover in more detail in this article. Also, unlike other articles you’ll find on this topic, this list is true for the deep web (the invisible web), not the dark web. Also, these services are all free.

1. Wayback Machine – Explore Old Websites

Do you remember visiting a website years ago that you loved, but it disappeared from the internet? Well, you can still enjoy all of the content you enjoyed on that website using the Wayback Machine.

Just type the URL address of that website into the search field and select Browse History

wayback machine

You’ll see results from the Wayback Machine’s database with the snapshots the site captured over time, as far back as when the website first existed.

2 wayback machine

Select any of the green (successful) snapshots, and you’ll be whisked away to the version of that website on that date. Remember Yahoo GeoCities?

3 wayback geocities

The Wayback Machine is one of the most entertaining websites to explore the internet’s long and fun history fully.

2. Directory of Open Access Journals: Read Free Journals

Do you enjoy expanding your mind by reading academic journals and articles? The Directory of Open Access Journals (DOAJ) is the site for you.

Just type the topic you’re interested in using the search field and select Search.

Search results include links to access the free journal or website, the majority of which are absolutely free to read.

This is a great first stop if you’re doing any academic research or want something educational to read on topics you’re interested in.

3. Elephind – Read Historic Newspaper Articles

If you like history, you’re going to absolutely love Elephind. You can search on any topic you’re interested in and find newspaper scans from as far back as the 1700s.

Select any of the links in the results to see actual scans of the original newspaper.

You can go back and read articles covering some of the most famous historical events from the viewpoints of the reporters who lived through that era.

4. WorldCat

Libraries are still the world’s largest collections of information that you can hold and page through. If you want to see if something is available in any library nearby without having to drive there, you can use the WorldCat library search page to check.

The results that you’ll see are a combination of both print books and resources and electronic sources of information.

In many cases, if you have a library card, you can use the link to obtain a copy from your library without even having to go there.

5. USA.gov

If you’re a researcher looking for a government grant, interested in learning more about government services for people with disabilities, or just looking for more information about the government response to emergencies, USA.gov is a good first stop.

For American citizens, this is the best place to go if you’re not sure where to start looking for government resources. Just use the search field at the top to search for the topic you’re interested in.

While many of the results are searchable via Google as well, USA.gov is focused on government resources. This means that information that may not turn up as easily on Google, you’ll find much more easily here.

6. Project Gutenberg

If you love e-books, then you really need to start using Project Gutenberg. The site houses roughly 60,000 free e-books that you’ll never find if you’re using Google to search for them.

Use the Project Gutenberg search field to search by topic, title, or author.

You’ll find surprisingly popular e-books and well-known authors.

You’ll also find many more obscure e-books that you’ll be pleased to have discovered. It’s truly a treasure-trove of great reading.

7. FREE Google Books

You’ve probably heard of Google Books. This is where you can search for digitally scanned versions of books and purchase them to read. However, did you know that there’s an entire section of Google Books dedicated to free books?

From the Free Google Books page, you can search the entire collection by topic, title, or author.

When you find and select a title, you can use the Google Books electronic reader to scroll through the pages as you read.

These aren’t exactly NY Times bestseller novels, but many of the free scanned titles you’ll find here are interesting. The focus here is mostly on antique or vintage books that are no longer in circulation. However, you might come across a more modern title occasionally as well.

8. Google Scholar

If you’re a student or researcher, Google Scholar is a great resource for finding citations and references. This search tool will pull up various academic articles, books, white papers, and even court opinions that are freely accessible to the public.

You’ll see links to the right of each synopsis to read the content. This is usually either in HTML or PDF format.

9. ibiblio

ibiblio is probably one of the single most useful sites for anyone interested in free digital content. You can browse or search for open source software, music, literature, and much more at this site.

If you’re not sure where to start, it’s highly recommended that you use the Browse by Categorized Tags section. The list of categories will give you a good indication of the type of free digital content that you’ll find inside this vast collection.

10. The Internet Archive

We already mentioned the Wayback Machine in this article. However, the site that houses that tool also contains another large collection of digital content free to the public – the Internet Archive.

Just use the search field on the main page to look for free software, articles, books, movies, audio, and much more. If you’re not sure what you want, select one of the icons representing the type of content you’re interested in.

As you can see from the numbers under each icon, the digital collection is vast and full of very cool, free stuff.

[Source: This article was published in groovypost.com By Ryan Dube - Uploaded by the Association Member: Barbara larson] 
Published in Deep Web

The invisible Web, as the name suggests is the invisible part of the World Wide Web which either is not indexed on the search engine or is subjected to various access restrictions. The regular search engines cannot trace or track the content uploaded on the Invisible web which means not everyone can get access to it. Just in case you aren’t aware, the World Wide Web can be called the metaphor Ocean which further has different sections like Surface Web, Shallow Web, Deep Web, and Dark Web.

  • Surface Web includes the normal part of the Web which we browse and it includes the set of websites indexed by the automated search engines. Search engines can index and track all the content uploaded on the Surface Web and thus it is available for everyone. All the social networking websites, online shopping, etc comes under Surface Web.
  • Shallow Web is basically used by the developers and other IT people which includes the databases stored by the developers, servers, programming language, etc. It is actually the background of the web pages you and I browse.
  • Dark Web and Deep Web – These two are slightly different and combinedly make the term Invisible Web. All the information and content stored or uploaded on the Dark and Deep Web are hidden and are not accessible to everyone. The Deep Web includes personal content like online banking, email inboxes, cloud storage, etc which requires some kind of authorization to access.

Whereas the Dark Web actually refers to a set of anonymously hosted websites that are not indexed by the regular search engines. There are specific web browsers and search engines to access the deep web search engines and this is what we are going to learn in this post.

Invisible Web Search Engines / Deep Web Search Engines

1] The WWW Virtual Library

Started by Tim Berners Lee, the creator of the World Wide Web, the WWW Virtual Library is the oldest web catalog. It is actually a wide range catalog that compiles the key links of various web pages in different categories like Agriculture, Arts, Recreation, Education, etc. This virtual library lives on hundreds of different servers worldwide. Check it here.

1] USA.Gov

If you are looking for any information on US government services and programs you can check the USA.Gov. The website is very simple and comes with a user-friendly interface. Just use the search box to find what you are exactly looking for. It is very well organized as per the categories. Check USA.Gov here.

2] Elephind

This website is one of its kind as it showcases international historical newspapers. It includes 3,866,107 Newspapers and 4,345 Newspaper titles which is huge. Most of the newspapers shown on this website are on the deep web and are not indexed on Google or other traditional search engines. You will get the newspapers from the 17th Century too. You can either use the search bar to get a specific newspaper or can go through the newspaper archives. Check Elephind here.

4] Voice of the Shuttle

Voice of the Shuttle is an excellent resource for anyone interested in Humanities. It is a beautifully and perfectly curated collection of deep web content. The collection includes a wide range of categories right from Architecture to General Humanities, Literature to Legal studies, and a lot more. It has been listed in Forbes as the best of the Web directory in the Academic research category.  Check Voice of Shuttle here.

5] Ahmia

It is a Dark web search engine and you need to install the Tor web browser to use it. You won’t be able to open the links without the Tor browser. Ahima indexes the hidden content published on Tor. Check Ahmia here at https://ahmia.fi.

These were the five search engines to explore the Invisible Web or Deep web. 

Alternative Deep Search Engines to Explore the Invisible Web

[Source: This article was published in thewindowsclub.com By ShiwangiPeswani - Uploaded by the Association Member: Olivia Russell] 
Published in Deep Web

The best people search sites make it easy to locate a long-lost friend, estranged family member, or missed connection. You can also use a top-rated people search service to confirm someone is who they claim to be.

To trace an individual, you only need to know a few key details - like their full name and location. You may be wondering whether a search engine, like Google or Bing, would give you similar information as professional people's search sites, like Intelius, Truthfinder, and Instant CheckMate. Standard search engines are great to find social media accounts and public-facing profiles, but you're likely to run into some difficulty when it comes to locating a specific individual and confirming their identity.

People's search sites offer great tools and resources to uncover extensive information on the searched person. This article aims to review some of the best people search sites available, comparing pricing models, key features, and more.

Keep reading to find out more about people finder services.

At a Glance: The Best People Search Websites

  1.  Intelius - best overall people search website
  2. Truthfinder - best people search site for multiple searches
  3. Instant CheckMate - best people search site to find lost relatives



    Intelius is one of the leading people search sites, providing a vast amount of public data about individuals and their connections to others. The company is transparent and aims to build trust with its customer base.

    It has an A+ rating with the Better Business Bureau and makes it clear that the platform is not considered a Consumer Reporting Agency as defined by the Fair Credit Reporting Act (FCRA). This means Intelius does not provide consumer reports with the intent of determining someone's credit, employment, insurance, housing, etc.

    But if you want to learn more about friends, relatives, coworkers, or people you're dating, Intelius’s people search engine is a great choice! In just a few clicks, the proprietary data search engine sorts through data from reliable sources to provide you with some valuable information on the person.

    Its people search feature outlines the main points of an individual's digital identity from a broad range of data sources throughout the internet. Whether you're looking for a long-lost family member or simply want to learn more about a potential date, Intelius empowers you with the information needed.

    Intelius People Search Reports Include:

    • Full name
    • Phone number
    • Past and present addresses
    • Age and date of birth
    • Possible relatives
    • Aliases
    • And more

    Key Features

    Confidential Searches

    Intelius is dedicated to customer protection and privacy. They always keep your identity anonymous and will never alert the individual that you've searched to uncover their information on a people search site. Plus, every search is guaranteed to be secure with the 256-bit encrypted connection. Everything done is completely safe and confidential. No one will ever know you searched for them.

    Fast and Reliable Reports

    It's a reliable resource to search for finding people. With over 20 billion available public records, these people search engine scours the internet for data and valuable information from specialized sources. The company is constantly updating its people search engine to provide users with the most up-to-date, accurate, and widespread information out there.

    Additional Searches Available

    If you wish to extend your search to learn other information, you can do so right on the site. In addition to the people search engine, Intelius also offers other types of searches - such as background check services, reverse phone lookups, and reverse address lookups.


    • Intelius offers a basic free people search
    • Starting membership price: $19.95/month
    • Premier Plan: $19.95/month
    • Premium Plus Plan: $29.95/month
    • Single people search or reverse address lookup: $0.95
    • Single background check: $39.95



      Even though Truthfinder is primarily a background check service, it's also considered one of the best people search sites. The people finder tool is a great resource to track down old friends, locate long-lost relatives, reconnect with former classmates, or learn more about new people in your life.

      To use the people finder feature, you can search people by name, phone number, or by address. If you wind up searching for someone by name, make sure you use all the different versions of their name until you find the right person. For example, someone named Robert could go by the nicknames Rob or Bob. If you input all the information you have on this person and try different variations of their name, you're more likely to be successful in your search.

      Truthfinder People Finder Services Include:

      • Full name
      • Phone number
      • Possible family members, friends, and roommates
      • Social media accounts
      • Educational background
      • Property ownership
      • And more

      You could also choose to use this people search website for background checks, which generally includes gives more detailed reports with information like -

      • Criminal records
      • Bankruptcies and liens
      • Court records
      • Contact details
      • Address history

      Key Features

      Dark Web Search

      Truthfinder is a fantastic people search website, allowing you to connect with people and find the information you need. But the site has various features and can be used for all different reasons, like a dark web search. This service searches through thousands of data points on the dark web and uses impressive methods of surveillance to protect your data. You can use it as a monitoring system for cybercriminals, or to further search for people and their information.

      Public records databases

      This website gathers a complete report, using data aggregation to sort through a variety of different public records- such as birth and death records, arrest and criminal records, and bankruptcy and lien documentation. Having access to this level of information makes Truthfinder one of the best people search sites on the market.


      Truthfinder offers a free people search tool when first starting your search. The website isn't considered one of the free people search sites, but it will provide you with surface-level information - including:

      • Name
      • Age
      • Possible Relatives
      • Possible Locations

      Even though you can get this information for free, it can be very limiting. A paid membership will afford you access to various online databases and public records, including criminal records, financial assets, location history, employment, and education information, and overall more detailed reports. Here's what it'll cost you:

      • Starting price: $30/month
      • Three-month subscription: $26/month

      Instant CheckMate


        Instant CheckMate is another great option and one of the best people search sites for targeted searches. This US search platform has an A+ ranking with the Better Business Bureau. With all the data and information pulled, the site ensures its customers complete safety, security, and protection when using their services. Its search engine combs through various public data points, including social media accounts, email addresses, phone numbers, and more.

        Instant CheckMate has services that go beyond the capabilities of standard search engines. This people's search website has impressive public records search capabilities that compile information from public record databases, social media networks, and other reliable sources to build thorough reports on someone. With this large network of public records, you should be able to locate anybody you search for, find their contact information, and get a comprehensive report on them in a matter of minutes.

        Overall, it has one of the most comprehensive people search engines on the market, with a range of tools offered, helping users properly find a person.

        Instant CheckMate People Search Engines Can Find:

        • Address history, including previous states, cities, and zip codes
        • Location history
        • Telephone number hints
        • Links to family members and their phone numbers and email addresses
        • Date and place of birth
        • Social media accounts and usernames

        Key Features

        Sex Offender Database

        All reports generated on Instant CheckMate take criminal history and criminal records into account. This includes a map of all registered sex offenders in the local area that you are searching for. You can even look at the mugshots of the nearby sex offenders and details of the incident.

        Criminal Records

        Instant CheckMate has an impressive criminal records database, checking for a criminal record for all searched individuals. The database searches through millions of local, state, and national criminal record documents to provide users with up-to-date information.

        Mobile App Available for iOS and Android Devices

        Everything you can do on the Instant CheckMate, you can also do on their dedicated mobile app. It's user-friendly and offers several search options unique to its proprietary people search engines. Reverse phone lookup, reverse email lookup, and background check searches are all available on the mobile app.


        Instant CheckMate offers a monthly subscription payment option to its users. A monthly subscription will cost you around $34/month, while a 3-month subscription averages out to around $27/month. So, if you decide to pay for three months upfront, you'll wind up saving a few extra bucks on your monthly subscription fee.

        If you're uncertain about whether Instant CheckMate is the right people-finder platform for you, the service offers a five-day trial to try out its features and tools. While this trial period is not completely free, it only costs $1 for the full 5 days. And you can use the full suite of resources available, including reverse phone lookup, background check, reverse address lookup search engines. Just remember to cancel your account if you decide not to go with Instant CheckMate because it will automatically charge your card after those 5 days are over.


        In the past, before the internet age, accessing public records and finding important information on an individual was a frustrating, slow process. You'd have to submit requests to various entities either in person or in writing. If you didn't find anything at the local level, you would have to extend your search to include other state documents until you found the correct person.

        Nowadays, with people search sites and people search engines, you can obtain much of that information within the same day. Many of these robust search engines can sift through hundreds of public records documents in any city or state - in a matter of minutes.

        If you're looking to connect with old friends, colleagues, or family members, we highly suggest using one of the people search sites listed above. Each has proven itself to be a reliable resource, offering accurate and updated information.

        Alternative Best People Finder Search Engines

        [Source: This article was published in clevescene.com By TruthDiscover - Uploaded by the Association Member: Anthony Frank]
        Published in Search Engine

        Google and Bing are not capable of searching for everything. These extremely deep search engines are required to explore the invisible web.

        There are many areas on the internet that Google and Bing's web crawlers are unable to access, thus not everything on the internet will appear in a list of search results.

        You'll need to use specialized search engines to explore the invisible web. Here are our top 12 search engines for conducting a comprehensive online search.

        What is the Invisible Web, and How Does It Work?

        Before we get started, let's clarify what the term "invisible web" means. Simply said, it is a phrase for internet information that doesn't show up in search results or web directories.

        Although there is no official evidence, most experts agree that the invisible web is several times larger than the visible web. The numbers rapidly become mind-boggling when you consider that Google, Amazon, Microsoft, and Facebook alone store almost 1,200 petabytes.

        The deep web and the dark web are two categories of material on the invisible web.

        The Internet's Deep Layer

        The deep web is made up of content that requires some type of authentication to access. Library databases, email inboxes, personal records (financial, academic, health, and legal), cloud storage drives, workplace intranets, and so on are examples.

        You can access the information using a conventional web browser if you have the necessary credentials.

        The Internet's Dark Side

        The deep web is divided into two sections: the dark web and the deep web. To see the information, you will need a dedicated dark web browser (such as Tor). Because it is more anonymous than the ordinary web, it is frequently used for criminal operations including drug and weapon sales. You'll need to use a specialized invisible web search engine to explore the invisible web.

        The Best Deep Web Search Engines

        1. Pipl

        Pipl describes itself as the largest people search engine in the world. Pipl, unlike Google, can search searchable databases, member directories, court records, and other deep internet search information to provide you with a full portrait of a person. 

        2. DuckDuckGo

        DuckDuckGo is the Internet privacy company for everyone who's had enough of hidden online tracking. DuckDuckGo is also well-known for being a private search engine for the visible web, but did you know it also has an onion site where you can browse the dark web?

        Google is not the only search engine that has deeper web material. It finds its results by combining the results of more than 500 independent search tools. You may do a full online search using the standard DuckDuckGo engine and the. onion version.

        The onion site can be found at http://3g2upl4pq6kufc4m.onion/.

        3. The WWW Virtual Library

        The WWW Virtual Library is the internet's earliest catalog. It was founded in 1991 by Tim Berners-Lee, the inventor of the World Wide Web.

        Volunteers manually build the link list, resulting in a high-quality index of deep web information in dozens of areas.

        4. The Wayback Machine

        The Wayback Machine is a digital archive of the World Wide Web. It was founded by the Internet Archive, a nonprofit library based in San Francisco, California.

        Regular search engines only provide results from the most up-to-date version of a website. The Wayback Machine, on the other hand, is unique. Its servers save copies of over 361 billion web pages, letting you search for content that is no longer viewable on the internet.

        5. USA.gov

        The amount of information available on USA.gov is astounding. It is a one-stop shop for all the public information you'll ever need about any federal agency, as well as state, local, and tribal governments.

        You can also learn about government jobs, loans, grants, taxes, and more. Most of the content on the site will not be found on Google.

        6. not Evil Dark Web

        Check out notEvil Dark Web if you're seeking a dark web search engine. Because the site uses the. onion domain name, it cannot be accessed using a conventional web browser. Open a dark web browser like Tor and type hss3uro2hsxfogfq.onion into the address bar to load it.

        It has access to a database of over 32 million dark websites, implying that if it exists, this search engine will most likely discover it.

        7. Directory of Open Access Journals

        The Directory of Open Access Journals is a deep internet search engine that indexes academic articles and provides access to them. The papers are free to anyone who wants them.

        There are about 10,000 journals in the archive now, with 2.5 million articles covering a wide range of topics. Some of the information is accessible through Google Scholar, but we believe the DOAJ is a better research tool.

        8. Wolfram Alpha

        With Wolfram Alpha you get a computational web search engine, in other words, you can enjoy a deep web search engine that has a significant amount of data for you to take advantage of. The site has categories such as:

        • Mathematics
        • Step-by-step solutions
        • Words % Linguistics
        • Units and Measure
        • Chemistry
        • Date & Times
        • Art & Design
        • Music
        • Astronomy
        • Engineering
        • Food & Nutrition
        • Shopping
        • Earth Sciences and more!

        Once you choose a topic, the site gives you so many options that you won´t know where to start. For example, let us say you choose Chemistry. In that category, you can either have the site give you chemical formulas, Chemical quantities, chemical solutions, functional groups, and the list keeps going.

        9. Voice of the Shuttle

        Voice of the Shuttle is a must-read for anyone interested in the humanities. Since its launch in 1994, the site has amassed one of the most amazing collections of vetted deep web content.

        Over 70 pages of annotated links span topics ranging from architecture to philosophy.

        10. Ahmia

        Ahmia is the search engine for. onion domains on the Tor anonymity network. It is led by Juha Nurmi and is based in Finland. But there's a catch: it's one of the few dark web search engines that's also accessible on the public internet.

        Of course, you won't be able to open any of the links or results unless you have the Tor browser installed on your computer. It is, however, a terrific way to get a taste of what is accessible on the dark web without exposing yourself to the risks that come with accessing it.

        Except for these top ten Deep Search Engines to Explore the Invisible Web, there are other Search engines available to Explore the Invisible Web.
        Published in Deep Web

        The internet is an iceberg. And, as you might guess, most of us only reckon with the tip. While the pages and media found via simple searches may seem unendingly huge at times, what is submerged and largely unseen – often referred to as the invisible web or deep web – is in fact far, far bigger.


        What we access every day through popular search engines like Google, Yahoo or Bing is referred to as the Surface Web. These familiar search engines crawl through tens of trillions of pages of available content (Google alone is said to have indexed more than 30 trillion web pages) and bring that content to us on demand. As big as this trove of information is, however, this represents only the tip of the iceberg.

        Eric Schmidt, the CEO of Google, was asked to estimate the size of the World Wide Web. He estimated that of roughly 5 million terabytes of data, Google has indexed roughly 200 terabytes, or only .004% of the total internet.


        Beneath the Surface Web is what is referred to as the Deep or Invisible Web. It is comprised of:

        • Private websites, such as VPN (Virtual Private networks) and sites that require passwords and logins
        • Limited access content sites (which limit access in a technical way, such as using Captcha, Robots Exclusion Standard or no-cache HTTP headers that prevent search engines from browsing or caching them)
        • Unlinked content, without hyperlinks to other pages, which prevents web crawlers from accessing information
        • Textual content, often encoded in image or video files or in specific file formats not handled by search engines
        • Dynamic content created for a single purpose and not part of a larger collection of items
        • Scripted content, pages only accessible using Java Script, as well as content downloaded using Flash and Ajax solutions

        There are many high-value collections to be found within the invisible web. Some of the material found there that most people would recognize and, potentially, find useful include:

        • Academic studies and papers
        • Blog platforms
        • Pages created but not yet published
        • Scientific research
        • Academic and corporate databases
        • Government publications
        • Electronic books
        • Bulletin boards
        • Mailing lists
        • Online card catalogs
        • Directories
        • Many subscription journals
        • Archived videos
        • Images

        But knowing all these materials are out there, buried deep within the web doesn't really help the average user. What tools can we turn to in order to make sense of the invisible web? There really is no easy answer. Sure, the means to search and sort through massive amounts of invisible web information are out there, but many of these tools have an intense learning curve. This can mean sophisticated software that requires no small amount of computer savvy; it can mean energy-sucking search tools that require souped up computers to handle the task of combing through millions of pages of data; or, it can require the searching party to be unusually persistent – something most of us, with our expectations of instantaneous Google search success, won't be accustomed to.

        All that being said, we can become acquainted with the invisible web by degrees. The many tools considered below will help you access a sizable slice of the invisible web's offerings. You will find we've identified a number of subject-specific databases and engines; tools with an established filter, making their searches much more narrow.


        Open access journal databases (OAJD) are compilations of free scholarly journals maintained in a manner that facilitates access by researchers and others who are seeking specific information or knowledge. Because these databases are comprised of unlinked content, they are located in the invisible web.

        The vast majority of these journals are of the highest quality, with peer reviews and extensive vetting of the content before publication. However, there has been a trend of journals that are accepting scholarship without adequate quality controls, and with arrangements designed to make money for the publishers rather than furtherance of scholarship. It is important to be careful and review the standards of the database and journals chosen. "This helpful guide" explains what to look for.

        Below is a sample list of well-regarded and reputable databases.

        • "AGRIS" (International Information System for Agricultural Science and Technology) is a global, public domain database maintained in multiple languages by the Food and Agriculture Organization of the United Nations. They provide free access to agricultural research and information.
        • "BioMed Central" is the UK-based publisher of 258 peer-reviewed open access journals. Their published works span science, technology and medicine and include many well-regarded titles.
        • "Copernicus Publications" has been an open-access scientific publisher in Germany since 2001. They are strong supporters of the researchers who create these articles, providing top-level peer review and promotion for their work.
        • "DeGruyter Open" (formerly Versita Open) is one of Germany's leading publishers of open access content. Today DeGruyter Open (DGO) publishes about 400 owned and third-party scholarly journals and books across all major disciplines.
        • "Directory of Open Access Journals is focused on providing access only to those journals that employ the highest quality standards to guarantee content. They are presently a repository of 9,740 journals with more than 1.5 million articles from 133 countries.
        • "EDP Sciences" (Édition Diffusion Presse Sciences) is a France-based scientific publisher with an international mission. They publish more than 50 scientific journals, with some 60,000 published pages annually.
        • "Elsevier of Amsterdam is a world leader in advancing knowledge in the science, technology and health fields. They publish nearly 2,200 journals, including The Lancet and Cell, and over 25,000 book titles, including Gray's Anatomy and Nelson' s Pediatrics.
        • "Hindawi Publishing Corporation", based in Egypt, publishes 434 peer-reviewed, open access journals covering all areas of Science, Technology and Medicine, as well as a variety of Social Sciences.
        • "Journal Seek" (Genamics) touts itself as "the largest completely categorized database of freely available journal information available on the internet," with more than 100,000 titles currently. Categories range from Arts and Literature, through both hard- and soft-sciences, to Sports and Recreation.
        • "The Multidisciplinary Digital Publishing Institute" (MDPI), based in Switzerland, is a publisher of more than 110 peer-reviewed, open access journals covering arts, sciences, technology and medicine.
        • "Open Access Journals Search Engine" (OAJSE), based in India, is a search engine for open access journals from throughout the world, except for India. An extremely simple interface. Note: the site was last updated June 21, 2013.
        • "Open J-Gate" is an India-based e-journal database of millions of journal articles in open access domain. With a worldwide reach, Open J-Gate is updated every day with new academic, research and industry articles.
        • "Open Science Directory" contains about 13,000 scientific journals, with another 7,000 special programs titles.
        • "Springer Open" offers a roster of more than 160 peer-reviewed, open access journals, as well as their more recent addition of free access books, covering all scientific disciplines.
        • "Wiley Open Access", a subsidiary of New Jersey-based global publishers John Wiley & Sons, Inc., publishes peer reviewed open access journals specific to biological, chemical and health sciences.


        Your typical search engine's primary job is to locate the surface sites and downloads that make up much of the web as we know it. These searches are able to find an array of HTML documents, video and audio files and, essentially, any content that is heavily linked to or shared online. And often, these engines, Google chief among them, will find and organize this diversity of content every time you search.

        The search engines that deliver results from the invisible web are distinctly different. Narrower in scope, these deep web engines tend to access only a single type of data. This is due to the fact that each type of data has the potential to offer up an outrageous number of results. An inexact deep web search would quickly turn into a needle in a haystack. That's why deep web searches tend to be more thoughtful in their initial query requirements.
        Below is a list of popular invisible web search engines:

        • "Clusty" is a meta search engine that not only combines data from a variety of different source documents, but also creates "clustered" responses, automatically sorting by category.
        • "CompletePlanet" searches more than 70,000 databases and specialty search engines found only in the invisible web. A search engine as well-suited to casual searchers as it is to researchers.
        • "DigitalLibrarian": A Librarian's Choice of the Best of the Web is maintained by a real librarian. With an eclectic mix of some 45 broad categories, Digital Librarian offers data from categories as diverse as Activism/Non Profits and Railroads and Waterways.
        • "InfoMine" is another librarian-developed internet resource collection, this time from The Regents of the University of California.
        • "InternetArchive" has an eclectic array of categories, starting with the ‘Wayback Machine,' which allows the searcher to locate archived documents, and including an archive of Grateful Dead audience and soundboard recordings. They offer 6 million texts, 1.5 million videos, 1.9 million audio recordings and 126K live music concerts.
        • "The Internet Public Library" (ipl and ipl2) is a non-profit, student-run website at Drexel University. Students volunteer to act as librarians and respond to questions from visitors. Categories of data include those directed to Children and Teens.
        • "SurfWax" is a metasearch engine that offers "practical tools for Dynamic Search Navigation." It offers the option of grabbing results from multiple search engines at the same time, or even designing "SearchSets," which are individualized groups of sources that can be used over and over in searches.
        • "UC Santa Barbara Library" offers access to a diverse group of research databases useful to students, researchers and the casual searcher. It should be noted that many of these resources are password protected. Those that do not display a lock icon are publicly accessible.
        • "USA.gov" offers acess to a huge volume of information, including all types of forms, databases, and information sites representing most government agencies.
        • "Voice of the Shuttle" (VoS) offers access to a diverse assortment of sites, including literature, literary theory, philosophy, history and cultural studies, and includes the daily update of all things "cool."


        The following lists pool together some mainstream and not so mainstream databases dedicated to particular fields and areas of interest. While only a handful of these tools are able to surface deep web materials, all of the search engines and collections we have highlighted are powerful, extensive bodies of work. Many of the resources these tools surface would likely be overlooked if the same query were made on one of the mainstream engines most users fall back on, like Bing, Yahoo and even Google.

        Art & Design

        • "ArtNet" deals with pricing and sourcing work in the art market. They also keep track of the latest news and artists in the industry.
        • "The Metropolitan Museum of Art" site hosts an impressively interactive body of information on their collections, exhibitions, events and research.
        • "Musée du Louvre", the renowned museum, maintains a site filled with navigable sections covering its collections.
        • "The National Gallery of Art" premier museum of arts in our nation's capital, also maintains a site detailing the highlights, exhibitions and education efforts the institution oversees.
        • "Public Art Online" is a resource detailing sources, creators, prices, projects, legal issues, success stories, resources, education and all other aspects of the creation of public art.
        • "Smithsonian Art Inventories Catalog" is a subset of the Smithsonian Institution Research Information System (SIRIS). A browsable database of over 400,000 art inventory items held in public and private collections.
        • "Web Gallery of Art" is a searchable database of European art, containing nearly 34,000 reproductions. Additional database information includes artist biographies, period music and commentaries.


        • "Better Business Bureau" (BBB) Information System Search allows consumers to locate the details of ratings, consumer experience, governmental action and more of both BBB accredited and non-accredited businesses.
        • "BPubs.com" is the business publications search engine. They offer more than 200 free subscriptions to business and trade publications.
        • "BusinessUSA" is an excellent and complete database of everything a new or experienced business owner or employer should know.
        • "EDGAR: U.S. Securities and Exchange Commission" contains a database of Securities and Exchange Commission. Posts copies of corporate filings from US businesses, press releases and public statements.
        • "Global Edge" delivers a comprehensive research tool for academics, students and businesspeople to seek out answers to international business questions.
        • "Hoover's", a subsidiary of Dun & Bradstreet, is one of the best known databases of American and International business. A complete source of company and industry information, especially useful for investors.
        • "The National Bureau of Economic Research is perhaps the leading private, non-partisan research organization dedicated to unbiased analysis of economic policy. This database maintains archives of research data, meetings, activities, working papers and publications.
        • "U.S. Department of Commerce", Bureau of Economic Analysis is the source of many of the economic statistics we hear in the news, including national income and product accounts (NIPAs), gross domestic product, consumer spending, balance of payments and much more.

        Legal & Social Services

        Science & Technology

        • "Environmental Protection Agency" rganizes the agency's laws and regulations, science and technology, and the many issues affecting the agency and its policies.
        • "National Science Digital Library" (NSDL) is a source for science, technology, engineering and mathematics educational data. It is funded by the National Science Foundation.
        • "Networked Computer Science Technical Reports Library (NCSTRL) was developed as a collaborative effort between NASA Langley, Virginia Tech, Old Dominion University and University of Virginia. It serves as an archive for submitted scientific abstracts and other research products.
        • "Science.gov" is a compendium of more than 60 US government scientific databases and more than 200 websites. Governed by the interagency Science.gov Alliance, this site provides access to a range of government scientific research data.
        • "Science Research" is a free, publicly available deep web search engine that purports to use a sophisticated technology that permits queries to more than 300 science and technology sites simultaneously, with the results collated, ranked and stripped of duplications.
        • "WebCASPAR" provides access to science and engineering data from a variety of US educational institutions. It incorporates a table builder, allowing a combined result from various National Science Foundation and National Center for Education Statistics data sources.
        • "WebCASPAR" World Wide Science is a global scientific gateway, comprised of US and international scientific databases. Because it is multilingual, it allows real-time search and translation of reporting from an extensive group of databases.


        • "Cases Database" is a searchable database of more than 32,000 peer-reviewed medical case reports from 270 journals covering a variety of medical conditions.
        • "Center for Disease Control" (CDC) WONDER's online databases permit access to the substantial public health data resources held by the CDC.
        • "HCUPnet" is an online query system for those seeking access to statistical data from the Agency for Healthcare Research and Quality.
        • "Healthy People" provides rolling 10-year national objectives and programs for improving the health of Americans. They currently operate under the Healthy People 2020 decennial agenda.
        • "National Center for Biotechnology Information" (NCBI) is an offshoot of the National Institutes of Health (NIH). This site provides access to some 65 databases from the various project categories currently being researched.
        • "OMIM" offers access to the combined research of many decades into genetics and genetic disorders. With daily updates, it represents perhaps the most complete single database of this sort of data.
        • "PubMed is a database of more than 23 million citations from the US National Library of Medicine and National Institutes of Health.
        • "TOXNET" is the access portal to the US Toxicology Data Network, an offshoot of the National Library of Medicine.
        • "U.S. National Library of Medicine" is a database of medical research, available grants, available resources. The site is maintained by the National Institutes of Health.
        • "World Health Organization" (WHO) is a comprehensive site covering the many initiatives the WHO is engaged in around the world.

        [Source: This article was published in onlineuniversities.com By hilip Bump - Uploaded by the Association Member: Robert Hensonw]

        Published in How to

        If you're looking for simple ways to find what is available on the Invisible Web, curated directories like the ones listed in this article can be extremely useful tools to use. You can use any of these resources to find what is available on the Web that is not as easily searchable from a general search engine query. 

        The Invisible Web is easily accessible..that is, if you know where to look. Many individuals and institutions have put together invisible Web directories, which you can use as a jumping off point to surf the Invisible Web.

        Here are just a few:

        • The University of Michigan has put together OAIster, (pronounced "oyster") and encourages you to "find the pearls" on the Invisible Web. They have millions of records from more than 405 institutions as diverse as African Journals Online and the Library Network of Western Switzerland.
        • LookSmart's Find Articles.com lets you search print publications for articles; anything from popular magazines to scholarly journals. Be sure to check out their Furl tool to organize your Invisible Web search snippets.
        • The Library Spot is a collection of databases, online libraries, references, and other good info from the Invisible Web. Be sure to check out their "You Asked For It" section, where popular readers' questions are featured.
        • The US Government's official web portal is FirstGov.gov, an extremely deep (as in lots of content) site. You could spend hours here. It's interesting to note how much stuff you can get done online here as well, such as renew your driver's license, shop government auctions, and contact elected officials.
        • Search the vast holding of the UCLA Library online, including their special collections only found on the Invisible Web.
        • Check out Infoplease.com and its searchable Invisible Web databases. Results come from encyclopedias, almanacs, dictionaries, and other online resources only found on the Invisible Web.
        • The Central Intelligence Agency has the World Factbook, a searchable directory of flags of the world, reference maps, country profiles, and much, much more. Great for geography buffs or anyone who wants to learn more about their world.
        • The University of Idaho has created this Repository of Primary Sources, which contains links to manuscripts, archives, rare books, and much more. Covers not only the United States but countries all over the world.
        • Lund University Libraries maintains the Directory of Open Access Journals, a collection of searchable scientific and scholarly journals on the Invisible Web.
        • Looking for scientific information on the Invisible Web? Go to Scirus.com first. You can search either scholarly sources or Web sources or both.
        • Canada, ay? Then check out the Archival Records of Alberta. This is a web gateway to photographs, census records, and other archival records.
        • Want to find a plant that will survive overwatering, lack of sunlight, and general forgetfulness? You can probably find something in the USDA's Plants Database on the Invisible Web.
        • The Human Genome Database contains anything you would ever want to know..well, about the human genome on the Invisible Web, at least.
        • If you've got a medical question, check out The Combined Health Information Database, or CHID online. Its searchable subject directory is very user-friendly, and you can find information on pretty much anything to do with human health here.
        • Nonprofit organizations need searching tools too. The National Database of Nonprofit Organizations is an extensive site on the Invisible Web that not only provides locations and contact information for nonprofits but also gives detailed fiscal reports.
        • EEVL Xtra, a service put together by Heriot-Watt University in Edinburgh, Scotland. This excellent service has the ability to cross-search 20 engineering, mathematics and computing databases, including content from 50 publishers. Find articles, websites, and more on the Invisible Web.

        Source: This article was published lifewire.com By Jerri Collins

        Published in Deep Web

        It’s not Spiderman’s latest web slinging tool but something that’s more real world.

        The Invisible Web (or The Deep Web) refers to the part of the Internet that’s not indexed by the search engines. Most of us think that that search powerhouses like Google and Bing are like the Great Oracle — they see everything.

        Unfortunately, they can’t because they aren’t divine at all; they are just web spiders who index pages by following one hyperlink after the other. And, there are some places where a spider cannot enter.

        Take library databases which need a password for access. Or even pages that belong to private networks of organizations. Dynamically generated web pages in response to a query are often left un-indexed by search engine spiders.

        Search engine technology has progressed by leaps and bounds. Today, we have real time search and the capability to index Flash based and PDF content. Even then, there remain large swathes of the web which a general search engine cannot penetrate. The term, Deep Net, Deep Web or Invisible Web lingers on. However, of a misnomer they may be.

        It’s not that you can’t access the invisible web at all. It’s just that you must use the right tools to do so. Here are ten online indexes and search tools you should hit.

        1. The WWW Virtual Library

        This is considered to be the oldest catalog on the web and was started by started by Tim Berners-Lee, the creator of the web. So, isn’t it strange that it finds a place in the list of invisible web resources? Maybe, but the WWW Virtual Library lists quite a lot of relevant resources on quite a lot of subjects.

        For instance, there are 300 sub-libraries with their own categories within the main library. The History sub-library is a good example.

        You can go vertically into the categories or use the search bar. The screenshot shows the alphabetical arrangement of subjects covered at the site. Even as many deep web resources have come and gone, the WWW Virtual Library keeps on going even after 26 years.

        2. USA.gov

        This is the official site of the U.S. Government and the portal to all the public information you need on every federal agency or state, local, and tribal government. The site has an A-Z index of all topicson the portal and it’s a better way to pinpoint the information you want.

        Apart from the direct access, use filters like “Only USA.gov,” “Images,” or “Videos” at the top of the page for more specific results. And while you are here, don’t forget the partner sites like Kids.USA.gov and Publications.USA.gov which are other specialized information mines.

        3. Science.gov

        The blurb on the home page says it all. The scientific search engine taps into 60 databases and over 2,200 scientific websites that cover federal science information including the latest research and development results. Try the advanced search engine page for a deep web search across the government databases that exist in the country.

        The federal search tool can be your first doorway for multidisciplinary research that covers everything from agricultural information to the current trends in science education for schools in the U.S. It is also a primary source for searching Federally-sponsored opportunities and programs for STEM students.

        4. U.S Geological Survey

        The Map Topics and the images alone could be worth the price of admission. There is none because the government site is free. The job of the organization is to broadcast real-time or near real-time data and information on current conditions and Earth observations. But it is also a goldmine for academic and even casual research.

        Try the National Geologic Map Database catalog. Query satellite photos and Earth images with the EarthExplorer tool. Or, lean forward to search 100,000+ scientific publications, and books. And there is so much more.

        5. Directory of Open Access Journals

        Search for articles in Open Access journals. These are academic papers that are available to anyone “without financial, legal, or technical barriers other than those inseparable from gaining access to the Internet itself.” In short, the knowledge is free.

        DOAJ maintains quality control with rigorous peer review. The current repository has 9000+ journals with almost 2.5 million articles across all subjects. This information may not be available with a Google Search though Google Scholar may be able to access some of the information. But DOAJ is a better research tool as it neatly curated with a well-designed advanced search engine.

        6. Voice of The Shuttle

        Studying literature? Try Voice of The Shuttle. It is a rich directory for of online resources on literature, the humanities, and cultural studies. The search directory has evolved to include topics like Sci-Tech and Culture, Cyberculture, and Technology of Writing to keep pace with the times.

        It started as a support tool for the English Dept. of the University of California at Santa Barbara in 1994. Today, it continues to be updated and you can browse through both primary and secondary resources.

        7. RxList

        Though Google does offer medical information when you search with your symptoms, you need all the help you can get. RxList is a comprehensive database of US prescription medications. The index is a prescription drug encyclopedia, pill identifier, and pharmacy locator rolled into one.

        With the rise of supplements, there is also a dedicated part of the site for vitamins, herbs, and dietary supplements. Each section has its own search tool and/or an alphabetical listing.

        The medical resource is a quality offshoot of the WebMD network. The data comes from sources like the FDA, Cerner Multum, and First Data Bank, Inc.

        8. Infoplease

        This online encyclopedia started its life as a radio quiz show in 1938. Today, Infoplease is an information portal with a host of features. Using the site, you can tap into a good number of databases, electronic journals, almanacs, electronic books, thesaurus, atlas, bulletin boards, mailing lists, online library card catalogs, articles, and directories of researchers.

        Infoplease also has a few nice offshoots like Factmonster.com for kids and TeacherVision which are all part of the same educational network.

        9. WorldCat

        Think of it as the search engine for brick-and-mortar libraries across the world. The meta-catalog for 72,000 libraries in 170 countries can help you find any paper, book, thesis, videos, multimedia assets, and even museum artifacts stored somewhere.

        The best way to use this massive database is with the advanced search tool. The information found here is also useful for creating citations for your research paper.

        A search on WorldCat.org will return links to the resources in these databases. But to access these resources, you have to log in with a valid library membership. You can also use the “Ask a Librarian” feature to ask for help from librarians in charge.

        10. The National Security Archive

        This is a non-governmental resource for unclassified security documents. It is the largest repository of such documents outside the U.S. government. Set up to check rising government secrecy, the site uses a custom Google Search to give you access to more than 10 million pages of government documents.

        The papers are primary source material for journalists, security evangelists, and researchers. A growing collection of Electronic Briefing Books are a smaller part of the documents but give you a curated look at U.S. national security, foreign policy, diplomatic and military history, and intelligence policy.

        More Deep Web Sites Worth a Mention

        1. Elephind
        2. MagPortal
        3. Free Lunch
        4. Clinical Trials
        5. Project Gutenberg
        6. The Library of Congress
        7. Internet Archive (Including the Way Back Machine)
        8. The National Gallery of Art
        9. Scitation
        10. PubSpace

        How Do You Surf the Deep Web?

        It is difficult to pin down the size of the Deep Web. But it is estimated to be several times larger than the web we know so well. What is true is that the topic focus of the invisible web makes it a ripe area to hunt for information when we by habit barely click to Page 2 of the Google Search results page.

        It is also important here to make a distinction between the “invisible web” and the “Dark Net”. The invisible web is within the reach of a normal web browser while the dark net is dominated by TOR sites (and disreputable anonymous services) that need some technical wizardry to access.

        Just like general web search, searching the invisible web is also about looking for the needle in the haystack. Only here, the haystack is much bigger. The invisible web is definitely not for the casual searcher. It is deep but not dark because if you know what you are searching for, information is a few keywords away.

        Do you venture into the Invisible Web? Which is your preferred search tool?

        Source: This article was published makeuseof.com By Saikat Basu

        Published in Search Engine

        20 Ways To Search the Invisible Web

        Unlike pages on the visible Web (that is, the Web that you can access from search engines and directories), information in the Invisible Web is just not visible to the software spiders and crawlers that create search engine indexes. Since this information makes up the vast majority of available content on the Web, we are potentially missing out on some pretty amazing resources.

        However, that's where Invisible Web search engines, tools, and directories come in. There are many Invisible Web search tools that you can use to dive into this wealth of information, as you'll see from the following list. We'll take a look at twenty different search engines, directories, and databases you can use to uncover amazing content.

        2 Clusty

        Clusty is a meta search engine, meaning it combines results from a variety of different sources, filtering out duplicates and sifting the best content that you might not have seen otherwise to the top of the search results.

        More about Clusty

        Find Government Information with Clusty
        Ten Alternative Search Engines

        3 The Internet Archive

        The Internet Archive is an amazing database offering access to movies, live music, audio, and printed materials; plus, you can look at older, saved versions of nearly every site ever created on the Internet - over 55 billion at the time of this writing.

        More archives

        Google News Archive Search
        Use the Web to Find Archives
        Five online archives that are worth a second look

        4 USA.gov

        USA.gov is an absolutely mammoth search engine/portal that gives the searcher direct access to a wide variety of information and databases from the United States government, state governments, and local governments. This includes access to the Library of Congress, an A-Z government agency index, the Smithsonian, and much, much more.

        More government resources

        The Top Twenty Essential US Government Web Sites
        Free Public Records Search
        Google Uncle Sam

        5 The WWW Virtual Library

        The WWW Virtual Library gives you instant access to hundreds of different categories and databases on a wide variety of subjects, anything from Agriculture to Anthropology. More about this amazing resource: "The WWW Virtual Library (VL) is the oldest catalogue of the Web, started by Tim Berners-Lee, the creator of HTML and of the Web itself, in 1991 at CERN in Geneva. Unlike commercial catalogues, it is run by a loose confederation of volunteers, who compile pages of key links for particular areas in which they are expert; even though it isn't the biggest index of the Web, the VL pages are widely recognised as being amongst the highest-quality guides to particular sections of the Web."

        6 Science.gov

        Science.gov searches over 60 databases and over 2200 selected websites from 15 federal agencies, offering 200 million pages of authoritative U.S. government science information including research and development results. More about this astonishingly useful resource: "Science.gov is a gateway to government science information and research results. Currently in its fifth generation, Science.gov provides a search of over 60 scientific databases and 200 million pages of science information with just one query, and is a gateway to over 2200 scientific Websites (see Science.gov fact sheet).

        Science.gov is an interagency initiative of 19 U.S. government science organizations within 15 Federal Agencies. These agencies form the voluntary Science.gov Alliance which governs Science.gov."

        7 Wolfram Alpha

        Wolfram Alpha is a computational search engine, which means it stores a vast amount of pure data available to you via not only search, but also a question and answer format. More about Wolfram Alpha: "We aim to collect and curate all objective data; implement every known model, method, and algorithm; and make it possible to compute whatever can be computed about anything. Our goal is to build on the achievements of science and other systematizations of knowledge to provide a single source that can be relied on by everyone for definitive answers to factual queries."

        8 Alexa

        Alexa gives you specific analytical information about Web properties. More about this intriguing resource: "Alexa's traffic estimates are based on data from our global traffic panel, which is a sample of millions of Internet users using one of over 25,000 different browser extensions. In addition, we gather much of our traffic data from direct sources in the form of sites that have chosen to install the Alexa script on their site and certify their metrics."

        Website owners especially can benefit from the data that Alexa offers; for example, here's a list of the top 500 sites on the Web.

        9 Directory of Open Access Journals

        The Directory of Open Access Journals (DOAJ) indexes and provides access to quality open access, peer-reviewed journals. More about this online directory: "The Directory of Open Access Journals is a service that indexes high quality, peer reviewed Open Access research journals, periodicals and their articles' metadata. The Directory aims to be comprehensive and cover all open access scientific and scholarly journals that use an appropriate quality control system (see the section below) and is not limited to particular languages or subject areas. The Directory aims to increase the visibility and ease of use of open access scientific and scholarly journals—regardless of size and country of origin—thereby promoting their visibility, usage and impact."

        More than 10,000 journals and millions of articles are searchable using the DOAJ.

        10 FindLaw

        FindLaw is a gigantic repository of free legal information on the Internet, and offers one of the largest online lawyer directories available online. You can use FindLaw to locate an attorney, learn more about U.S. law and legal topics, and participate in the very active FindLaw community forums.

        11 The Online Books Page

        The Online Books Page, a service offered by the University of Pennsylvania, gives readers access to over two million books freely accessible (and readable) on the Internet. Users will also gain access to significant directories and archives of online texts,as well as special exhibits of particularly interesting classes of online books.

        12 The Louvre

        The Louvre online simply begs to be discovered and cherished by art lovers all over the world. View thematic collections of art, get more information about the background of selected works, view art aligned with historical events, and much, much more.

        13 The Library of Congress

        One of the most vivid and interactive sites on this list of Invisible Web resources, the Library of Congress offers an incredibly rich and varied array of content. Collection highlights include Congressional records, digital preservation resources, the Veterans History project, and the World Digital Library. More about this national treasure: "The Library of Congress is the nation's oldest federal cultural institution and serves as the research arm of Congress. It is also the largest library in the world, with millions of books, recordings, photographs, maps and manuscripts in its collections."

        14 Census.gov

        If you're looking for data, then Census.gov is one of the first places you'll want to visit. More about this considerable resource: "The U.S. Census Bureau conducts demographic, economic, and geographic studies of other countries and strengthens statistical development around the world through technical assistance, training, and software products. For over 60 years, the Census Bureau has performed international analytical work and assisted in the collection, processing, analysis, dissemination, and use of statistics with counterpart governments in over 100 countries."

        From geography to population statistics, you'll be able to find them here.

        15 Copyright.gov

        Copyright.gov is another U.S. government resource you can put in your Invisible Web search toolbox (for even more essential U.S. government sites, check out The Top Twenty U.S. Government Websites). Here, you can view works registered and documents recorded by the U.S. Copyright Office since January 1, 1978, as well as search records of registered books, music, art, and periodicals, and other works, including copyright ownership documents.

        16 Catalog of U.S. Government Publications

        The Catalog of U.S. Government Publications gives users instant access to electronic and print publications from the legislative, executive, and judicial branches of the U.S. government, with more than 500,000 records generated since July 1976.

        17 Bankrate

        Bankrate, an online financial resource that's been around since 1996, offers a huge library of financial information; anything from current interest rates to articles on CUSIP and much, much more.

        18 FreeLunch

        FreeLunch gives users the ability to quickly and easily find free economic, demographic, and financial data: "provides comprehensive and extensive historical and forecast data at the national and subnational/regional levels representing over 93% of global GDP. We cover more than 180 countries, over 150 global metro areas, all U.S. states, metro areas and counties. Our databases contain more than 200 million economic, financial, demographic and consumer credit time series, with 10 million added every year."

        19 PubMed

        PubMed, part of the National Center for Biotechnology Information, U.S. National Library of Medicine, is the perfect resource for anyone who's looking up medical or medical-related information. It offers more than 24 million citations for biomedical literature from MEDLINE, life science journals, and online books.

        20 FAA Data and Research

        The FAA Data and Research pages offer information on how their research is done, the resulting data and statistics, and information on funding and grant data. Anything from Aviation Safety to Unruly Passengers (seriously) can be found here.

        Published in Deep Web

        The Invisible Web refers to the vast amount of content and information that is not easily discoverable in a general search engine query, such as databases, private networks, or password-protected information. However, there are a wide variety of high quality Invisible Web search tools, search engines, and directories that can help you mine this fantastic resource that is considered to be at least 500 times larger than the visible Web.

        The following Invisible Web resources will connect you to a virtual goldmine of knowledge, anything from medical dictionaries to moving picture archives to academically vetted articles and journals. Each of these links connects you to a resource that will help you find information that is not easily found with just a simple, rudimentary search. These tools help you do a deep dive into untapped treasure troves of information. 

        The Invisible Web: A Brief Introduction

        The Invisible Web: What is the Invisible Web? Is it some kind of Area 52-ish, X-Files deal that only those with stamped numbers on their foreheads can access? Well, not exactly. If you're not familiar with what the Invisible Web really is, just keep reading to get a quick overview of what the Invisible Web really is, and how you can use it to find information. 

        Invisible Web Search Engines

        Five Search Engines You Can Use to Mine the Invisible Web: There are many Invisible Web search tools that you can use to dive into this wealth of information, as you'll see from the following list.....keep reading to understand what these search engines can offer you.

        The Top Ten Most Popular Search Engines can be used as a jumping off point for much of the Web's harder to find information. 

        FactBites: Factbites retrieves results that are academically oriented, i.e., dictionaries, encyclopedias, universities, and many .org sites (typically non-profit organizations).

        Invisible Web Directories and Portals

        Invisible Web Directories: Many individuals and institutions have put together invisible Web directories, which you can use as a jumping off point to surf the Invisible Web. 

        Medical Information on the Invisible Web: The Invisible Web has a goldmine of medical databases and specialized medical sites that just don't show up on a cursory search in the search engines. Best of all, this information is free.

        Humanities and Literature Resources on the Invisible Web: There are plenty of humanities resources on the Invisible Web, such as arts, literature, and history Web sites that will give you greater insight on what you might be reading for a class or help you on a research project.

        Invisible Web Research Databases and Reference Tools

        47 Alternatives to Wikipedia: Wikipedia is perhaps the most popular reference site online, with millions of high quality articles available on virtually any topic. However, there are limits to what Wikipedia can offer.

        How to Find Archives on the Web: Are you trying to find information about a historical event? Looking for online archives for news, music, popular culture, or movie information?

        Google Scholar: From one place, you can search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations.

        Find People with the Invisible Web

        Invisible Web People Search Resources: The following resources can help you delve deep into the Invisible Web, making your people searches even more rich, detailed, and authoritative.

        15 Search Engines to Help You Find Someone: Finding people on the Web is getting easier and easier. Here are fifteen people search engines you can use to find the person you're looking for on the Web.

        How to Find Someone on the Web, Step by Step: Need to find someone? Here's a step by step guide to finding someone on the Web using tools and services that are designed to find people online.

        Use the Invisible Web to Find Public Records

        The Top Twenty Essential US Government Web Sites: There are literally hundreds of thousands of US government and government-related Web sites that offer free access to a wide variety of information.

        How to Find Public Records: Here are the best free public record search databases online, from obituaries to census records.

        Do a Background Check on the Web: You can use the Web to do a free background check via a multitude of free sources on the visible and invisible Web.

        Books and Printed Materials on the Invisible Web

        How to Find and Read Full Books Online: More people than ever before in history are using the Web as a free library, and with good reason: there are literally thousands of free books online that you can download in their entirety, listen to in an audio book version, or simply read within your browser window.

        How to Find Works in the Public DomainPublic domain works are works whose copyrights were issued before 1923, and have now passed into the public domain, meaning that they can be used, reproduced, or incorporated in any way without any restrictions.

        How to Find PDF Files: If you are trying to find PDF (Adobe Acrobat) files on the Web, there's a number of ways that you can accomplish this. 

        Author:  Wendy Boswell

        Source:  https://www.lifewire.com

        Published in Deep Web

        No, it’s not Spiderman’s latest web slinging tool but something that’s more real world. Like the World Wide Web.

        The Invisible Web refers to the part of the WWW that’s not indexed by the search engines. Most of us think that that search powerhouses like Google and Bing are like the Great Oracle”¦they see everything. Unfortunately, they can’t because they aren’t divine at all; they are just web spiders who index pages by following one hyperlink after the other.

        But there are some places where a spider cannot enter. Take library databases which need a password for access. Or even pages that belong to private networks of organizations. Dynamically generated web pages in response to a query are often left un-indexed by search engine spiders.

        Search engine technology has progressed by leaps and bounds. Today, we have real time search and the capability to index Flash based and PDF content. Even then, there remain large swathes of the web which a general search engine cannot penetrate. The term, Deep Net, Deep Web or Invisible Weblingers on.

        To get a more precise idea of the nature of this ‘Dark Continent’ involving the invisible and web search engines, read what Wikipedia has to say about the Deep Web. The figures are attention grabbers – the size of the open web is 167 terabytes. The Invisible Web is estimated at 91,000terabytes. Check this out – the Library of Congress, in 1997, was figured to have close to 3,000terabytes!

        How do we get to this mother load of information?

        That’s what this post is all about. Let’s get to know a few resources which will be our deep diving vessel for the Invisible Web. Some of these are invisible web search engines with specifically indexed information.

        List of Search Engines to Explore the Invisible Web


        Infomine has been built by a pool of libraries in the United States. Some of them are University of California, Wake Forest University, California State University, and the University of Detroit. Infomine ‘mines’ information from databases, electronic journals, electronic books, bulletin boards, mailing lists, online library card catalogs, articles, directories of researchers, and many other resources.

        You can search by subject category and further tweak your search using the search options. Infomine is not only a standalone search engine for the Deep Web but also a staging point for a lot of other reference information. Check out its Other Search Tools and General Reference links at the bottom.

        The WWW Virtual Library

        This is considered to be the oldest catalog on the web and was started by started by Tim Berners-Lee, the creator of the web. So, isn’t it strange that it finds a place in the list of Invisible Web resources? Maybe, but the WWW Virtual Library lists quite a lot of relevant resources on quite a lot of subjects. You can go vertically into the categories or use the search bar. The screenshot shows the alphabetical arrangement of subjects covered at the site.


        Intute is UK centric, but it has some of the most esteemed universities of the region providing the resources for study and research. You can browse by subject or do a keyword search for academic topics like agriculture to veterinary medicine. The online service has subject specialists who review and index other websites that cater to the topics for study and research.

        Intute also provides free of cost over 60 free online tutorials to learn effective internet research skills. Tutorials are step by step guides and are arranged around specific subjects.

        Complete Planet

        Complete Planet calls itself the ‘front door to the Deep Web’. This free and well designed directory resource makes it easy to access the mass of dynamic databases that are cloaked from a general purpose search. The databases indexed by Complete Planet number around 70,000 and range from Agriculture to Weather. Also thrown in are databases like Food & Drink and Military.

        For a really effective Deep Web search, try out the Advanced Search options where among other things, you can set a date range.


        Infoplease is an information portal with a host of features. Using the site, you can tap into a good number of encyclopedias, almanacs, an atlas, and biographies. Infoplease also has a few nice offshoots like Factmonster.com for kids and Biosearch, a search engine just for biographies.


        DeepPeep aims to enter the Invisible Web through forms that query databases and web services for information. Typed queries open up dynamic but short lived results which cannot be indexed by normal search engines. By indexing databases, DeepPeep hopes to track 45,000 forms across 7 domains.

        The domains covered by DeepPeep (Beta) are Auto, Airfare, Biology, Book, Hotel, Job, and Rental. Being a beta service, there are occasional glitches as some results don’t load in the browser.


        IncyWincy is an Invisible Web search engine and it behaves as a meta-search engine by tapping into other search engines and filtering the results. It searches the web, directory, forms, and images. With a free registration, you can track search results with alerts.


        DeepWebTech gives you five search engines (and browser plugins) for specific topics. The search engines cover science, medicine, and business. Using these topic specific search engines, you can query the underlying databases in the Deep Web.


        Scirus has a pure scientific focus. It is a far reaching research engine that can scour journals, scientists’ homepages, courseware, pre-print server material, patents and institutional intranets.


        TechXtra concentrates on engineering, mathematics and computing. It gives you industry news, job announcements, technical reports, technical data, full text eprints, teaching and learning resources along with articles and relevant website information.

        Just like general web search, searching the Invisible Web is also about looking for the needle in the haystack. Only here, the haystack is much bigger. The Invisible Web is definitely not for the casual searcher. It is a deep but not dark because if you know what you are searching for, enlightenment is a few keywords away.

        Do you venture into the Invisible Web? Which is your preferred search tool?

        Author:  Saikat Basu

        Source:  http://www.makeuseof.com/

        Published in Search Engine


        World's leading professional association of Internet Research Specialists - We deliver Knowledge, Education, Training, and Certification in the field of Professional Online Research. The AOFIRS is considered a major contributor in improving Web Search Skills and recognizes Online Research work as a full-time occupation for those that use the Internet as their primary source of information.

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