The line has gotten blurred between search engines and subject directories, as search engines include directories and directories include search options.
These sites let you make your own custom search engine that will search selected sites or topics.
Google's API makes it possible for others to develop applications that work with Google.
These applications produce visual representations of search engine results (including clustering).
Ask these search engines a question. Note: Google and Bing sometimes provide answers in response to queries.
The so-called invisible Web is data that's locked up in databases, or it's in non-text formats, but in either case, it's hidden from search engines. Also, What is the Invisible Web? (UC Berkeley libraries)
Some of these sites (also known as metasearch engines) let you search several search engines all at once; others list many search engines on a single page (these are sometimes called all-in-one pages).
See what your fellow surfers are searching. Some of these are popular searches of the day; others are what people are searching right this minute.
This software works with your browser to help you search or surf. Some of this software can do desktop searches as well.
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