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invisible web, hidden web, and deep web all refer to the same thing: a massive storehouse of online data that the search engines don't capture. That's because terabytes of information are buried in databases and other research resources. Searchable and accessible online but often ignored by conventional search engines, these resources exist by the thousands. Known in research circles as the invisible, deep, or hidden Web, this buried content is an estimated 500 times larger than the surface Web, which is estimated at over four billion pages. This mass of information represents a potent research resource, no matter what your discipline or interest. Below are some tools to help you mine it. Students and serious researchers may also find our collections of web directories and scholarly and academic research tools and strategies useful.

Find the best flight deals with Matrix Matrix showcases some of the freshest travel search ideas from ITA Software. We're constantly updating it, so let us know what you think. If you prefer, you can still access the original version.

the peer-reviewed open-access encyclopedia written by scholars from all around the world. Scholarpedia feels and looks like Wikipedia -- the free encyclopedia that anyone can edit. Indeed, both are powered by the same program -- MediaWiki. Both allow visitors to review and modify articles simply by clicking on the edit this article link.

The New Search Engine for Sources of Real-Time News. Find profiles to 'follow' to get the best real-time news - or increase your rank so more people find and follow you! We're in a private beta at the moment. Want a sneak peek? Enter your email address below. When we have more access codes available, we'll email you one!

access all search engines without retyping

minerazzi is a scholarly search engine of miners, designed by and for scholars. It is currently in beta and accessible to beta testers only. At minerazzi, a miner is defined as a search interface with direct access to multiple databases. Databases can be part of university sites, school libraries, search engines, directories, searchable websites, or entire social networks.

DoCIS is a service of the rclis digital library. rclis is dedicated to promoting free access to data about documents in computing and library and information science. DoCIS provides an integrated browsing/searching interface to rclis data. To start browsing our collection, please look at the list of journals and conference proceedings that we cover.

A metasearch engine is a search tool[1] that sends user requests to several other search engines and/or databases and aggregates the results into a single list or displays them according to their source. Metasearch engines enable users to enter search criteria once and access several search engines simultaneously. Metasearch engines operate on the premise that the Web is too large for any one search engine to index it all and that more comprehensive search results can be obtained by combining the results from several search engines. This also may save the user from having to use multiple search engines separately.

BUFVC hosts, curates and delivers 9 substantial online databases relating to film, television and radio content dating from 1896 onwards. You can now search more than 13 million records in one go, or if you wish, one collection at a time. The content and access of individual collections is listed below.

On this site, you'll find a list of tweets with the keywords: US News, World News and Tweet News. This page will automatically update every 180 seconds, so you'll always have access to the latest tweets.

"Enabling search and global access to Tor's onionsites"

"Dataset Search enables users to find datasets stored across thousands of repositories on the Web, making these datasets universally accessible and useful."

"The basic idea of developing TAS Enterprise Search was to help identifying and enabling all content across the enterprise to be indexed, searched, and displayed to authorized users. Whether you have your own data or it comes from the TAS Data Collector, it is more transparent and useful if a sophisticated keyword search function is available, because the text content without access is worthless."

" Play albums from your favorites artists and improve YouTube music experience MusixHub is a music network that gives you easy and unlimited access to music, for free. "

"his gateway to Tor hidden services provides convenient access to Tor hidden services. It is a pure proxy that forwards requests to the respective hidden service. We do not store any data and are not liable for the content."

"There are millions of undiscovered channels on YouTube. Our search tool helps you filter for specific creators, make channel lists and find ways to contact them! Choose a Premium account to access 30+ filters and view thousands of channels each day."

"RefSeek is a web search engine for students and researchers that aims to make academic information easily accessible to everyone. RefSeek searches more than five billion documents, including web pages, books, encyclopedias, journals, and newspapers."

"Sync & End-to-End Encryption Your content is securely end-to-end encrypted and only you can access it."

"All-in-One AI extension to Write, Summarize, Code & Play"

Free, full text, quality controlled scientific and scholarly journals, covering all subjects and many languages