Research and Reference Resources

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Search Engines

Search Engines (Primary | Secondary | Directories) | Meta Search Engines | "Deep" or "Invisible" Web | Quick Guide on How to Use Search Engines | Connect Guide | More Information about Computers and the Internet

Primary Search engines help you find content on the web.

• Ask
• Exalead
• Google
• Windows Live Search
• Yahoo Search

Secondary Search Engines

• Gigablast
• Hotbot (multi search engines: Ask, MSN)
  Wayback Machine (Know you saw it on the internet but can't find it today? Use the Wayback Machine to look at archived versions of internet sites as they appeared on certain dates in the past).

Directories:

• About.com
• Google Directory
• Librarians' Internet Index
• Looksmart
• Open Directory Project (DMOZ)
• Yahoo Directory

Meta Search Engines

Meta search engines search several different search engines at once to find information on the web.

• Dogpile
• Metacrawler

"Deep" or "Invisible" Web

"Deep" or "invisible" web sources contain information that can not be found using typical search engines. They consist of information that is held in a database and must be searched using the specific search feature for that database. A few examples of invisible web content include stock quotes, magazine articles, census data, property listings, and phone number and address directories.

Use our Web Sites by Subject to find recommended invisible web resources by topic, or use the following resources to help you find deep web content.

• Infomine
• Invisible-Web.net

For more about the invisible web, see

• Invisible Web: What it is, Why it exists, How to find it, and Its inherent ambiguity
• Those Dark Hiding Places: The Invisible Web Revealed

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