Boolean operators are logical expressions used to combine search terms that were named after mathematician George Boole and include AND to narrow searches by requiring both terms, OR to broaden searches by including results with either term, and NOT to narrow searches by excluding unwanted information.

1. Boolean OperatorsAnd, Or, Not

2. What is a Boolean Operator?Boolean Operators are used to combine logical expressions into complex expressions

3. History of Boolean OperatorsBoolean Operators are named for British-born Irish mathematician, George Boole.

4. And (+)“And” narrows your search by combining terms; searches for both terms.

5. Or“Or” broadens a search to include results containing both of the terms you type in.

6. Not(-)“Not” narrows a search by reducing search results based on the information you want to exclude.