Very user-friendly search engine with subject categories. Ixquick Searches 14 engines. Regular searches, natural language searches, and boolean searches, knows which engines can handle which types of searches. Mamma Searches 10 other search engines at one time. Search Engines are indexing tools that search the Internet for occurrences of a specific word or phrase.
Directories are searchable collections of sites that have been arranged by subject or concepts.
Meta Search Engines search several search engines at the same time.