For more about search engines:
Search engines are software programs that are designed to search and retrieve records from a database, index, or the Internet.
The search engines on this page are divided into five types: Single Search Engines, Meta Search Engines, Specialty Search Engines, Directories, and Images.
Some search engines provide the results for the others.
View these charts showing the relationships between several commonly used search engines. The charts may not be up to date and the library cannot vouch for their accuracy. But they are interesting.