Part of the Mathematics glossary:

The term "Boolean," often encountered when doing searches on the Web (and sometimes spelled "boolean"), refers to a system of logical thought developed by the English mathematician and computer pioneer, George Boole (1815-64). In Boolean searching, an "and" operator between two words or other values (for example, "pear AND apple") means one is searching for documents containing both of the words or values, not just one of them. An "or" operator between two words or other values (for example, "pear OR apple") means one is searching for documents containing either of the words.

In computer operation with binary values, Boolean logic can be used to describe electromagnetically charged memory locations or circuit states that are either charged (1 or true) or not charged (0 or false). The computer can use an AND gate or an OR gate operation to obtain a result that can be used for further processing. The following table shows the results from applying AND and OR operations to two compared states:

0 AND 0 = 0 1 AND 0 = 0 1 AND 1 = 1
0 OR 0 = 0 0 OR 1 = 1 1 OR 1 = 1

For a summary of logic operations in computers, see logic gate.

This was last updated in April 2005
Posted by: Margaret Rouse

Related Terms

Definitions

  • normal distribution

    - A normal distribution is an arrangement of a data set in which most values cluster in the middle of the range and the rest taper off symmetrically toward either end.  A graphical representation of ... (WhatIs.com)

  • zettaflops

    - Zettaflop or (ZFlop) is a processing power of one septillion floating point operations per second (FLOPS). The zetta in zettaflop represents 10 to the 21st power -- 10 multiplied by itself 21 times... (WhatIs.com)

  • mathematical induction

    - Mathematical induction is a a specialized form of deductive reasoning used to prove a fact about all the elements in an infinite set by performing a finite number of steps.  (WhatIs.com)

Glossaries

  • Mathematics

    - Terms related to mathematics, including definitions about logic, algorithms and computations and mathematical terms used in computer science and business.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Ask a Question. Find an Answer.Powered by ITKnowledgeExchange.com

Ask An IT Question

Get answers from your peers on your most technical challenges

Ask Question

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.