If, when searching the general search engines, you are unable to locate exactly what you need, try the sites listed below to locate specialized search engines. Much of what is available on these sites may not be found using general search tools. Beaucoup This is one of the oldest guides, listing over 2,500 specialized search engines, directories, and indexes, divided into 15 subject categories and over 40 subcategories. Beaucoup includes both academic and general engines in the sciences , technology , politics , government , and the humanities . This guide lists over 1,500 specialized search engines divided into 19 main categories and hundreds of subcategories.
Coverage is broad and includes topics for general, professional, and academic audiences.
Subjects include computers , education , health , and law . It contains hundreds of search engines, organized into 27 subject categories. This site provides search engines for 160 countries and lists engines for individual cities and states in the United States. This site contains over 10,000 search engines divided into 18 subject categories and hundreds of subcategories. Subjects include investments , legal , travel , sciences , and reference materials .