Identifying keywords or phrases and then connecting them using Boolean operators (AND, OR, and NOT), along with the other tools in this guide, can help you narrow, expand, and/or refine your searches ...

A search for data that meets several criteria by using the Boolean operators AND, OR and NOT (see Boolean logic). For example, the request: "Search for all Spanish and French speaking employees ...

Each operator has a standard symbol that can be used when drawing logic gate circuits. In an AND gate, both inputs need to be 1 for the output to be 1.

Boolean operators close Boolean operatorAND, OR and NOT. Used to build complex queries in a database. are used to combine relational operators to give more complex decisions.

NOT reverses the input. For a diagram of these actions, see Boolean gates. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.