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Boolean Searching: What is Boolean searching?

Boolean logic defines logical relationships between terms in a search. The Boolean search operators are AND, OR and NOT. You can use these operators to create a very broad or very narrow search.

George Boole

The English mathematician George Boole (1815-1864) invented mathematical, or symbolic, logic and uncovered the algebraic structure of deductive logic, thereby reducing it to a branch of mathematics.

Source Citation:

"Boole, George (1815-1864)." Encyclopedia of World Biography. Detroit: Gale, 1998. Gale Biography In Context. Web. 25 Mar. 2011.


The primary operations of Boolean logic are AND, OR, and NOT. Boolean logic is named after the 19th century English mathematician George Boole. As add, subtract, multiply, and divide are the primary operations of mathematics, the primary operations of Boolean logic are AND, OR, and NOT. These operators can be applied when searching electronic databases the library subscribes to such as  Academic Search Premier (EBSCOhost).

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Diane Baker
William Hessel Library
Lake Michigan College
2755 East Napier Avenue
Benton Harbor, MI 49022