How to Search the Deep Web also called the Invisible Web or the Hidden Web. This is the vast section of the Internet which is hidden and not accessible through regular search engines and web browsers. It is estimated to be about 500 times the size of the Web (surface web, visible web) that we know. The Deep Web is referred to the data which are not indexed by any standard search engine such as Google, Bing or Yahoo Search. The ‘Deep Web’ refers to all web pages that search engines cannot find, such as user databases, registration-required web forums, webmail pages, and pages behind paywalls. Search engines like Google are incredibly powerful, but they can’t crawl and index the vast amount of data that is not hyperlinked or accessed via public DNS (The Domain Name System) services.
How to Search the Deep Web versus Surface Web
How is the Deep Web different from the Surface Web? The Surface Web contains only a fraction of the content available on-line. Standard search engines simply cannot find or retrieve content in the Deep Web. Why? Because many of the Deep Web sources require a direct query to access a database, and standard search engines aren’t built to do that. Search engines “crawl” or “spider” web pages, following one hypertext link to another. This process takes the pages and puts them into an index that the engine can refer to during future searches. The Deep Web however, consists of both structured and unstructured content – a huge amount of which is found in databases. This content has often been compiled by experts, researchers, analysts and through automated processing systems at an array of institutions throughout the world.
High-value Information found on the Deep Web
There are many high-value collections to be found within the deep web (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 (eBooks), Bulletin boards, Mailing lists, Online card catalogs, Directories, Many subscription journals, Archived videos, and 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, but we all can become acquainted with the invisible web. The many tools considered below will help you access a sizable slice of the invisible web’s offerings. You will find 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.
- Invisible Web Search Engines. 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.
- Subject -Specific Databases. 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 highlighted are powerful, extensive bodies of work.
- Art & Design
- Legal & Social Services
- Science & Technology
Comment: In the coming days, we will provide information about each area. This information is very good for university students, researchers, business learners – and not to mention journalists and reporters who has an interest the deep web and the dark web, which, by the way. is two different things to write about. The dark web is a much smaller part of the deep web, but it is very important not to mix-up these two very different web definitions.