PowerPoint presentation describing the use of Boolean Logic in Online Searching

Select the link below to discover what is Boolean Logic and how it will make your online searching more efficient and more effective.

- The Genius of George BooleWhy Boolean Logic is important for online searching.

Boolean Logic is Algebra that works with logical rather than numeric relationships.

- Boolean algebra was introduced in 1854 by George Boole
- Boole devised a mathematical language to deal with questions of logic.
- Boole is now considered the father of modern information technology

Algebra comes from the Arabic *al-jebr* meaning "reunion of broken parts" (jebr can be pronounced either gobre or jobre)

- Algebra uses letter to represent unknown number
- In Algebra variables like x and y = numerical values
- for example x + 4 = 8

Boolean Logic is a form of algebra in which the variables have a logical value of TRUE or FALSE.

- In Boolean algebra x and y = classes of objects
- for example x = triangles and y = circles

Boolean Operators

**AND** = Can be thought of as **BOTH**. It requires that both or all objects (search terms) be present in the results. In online searching AND serves to narrow the search and is used for combining differing concepts.

**OR** = Can be thought of as **EITHER**. It is used to find either one term or another. In online searching OR serves to broaden a search and is used to search synonymous or closely related terms.

**NOT** = Can be thought of as **AND NOT**. It is used to eliminate records. In online searching it serves to narrow a search. Exercise caution when using the Boolean NOT as needed concepts may be eliminated unintentionally.

Janet "Miss T." Tillman

Robert L. Powell Library

The Master's University

21726 Placerita Canyon. Rd.

Santa Clarita, CA 91321

The Master's University

21726 Placerita Canyon. Rd.

Santa Clarita, CA 91321

1.661.362.2201

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