Chemeketa Community College
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Boolean searching is a technique of searching by linking concepts together with commands known as Boolean operators. Examples of Boolean operators are "AND" and "OR." Boolean searching is a powerful tool for refining a search to produce a highly focused result.
Let's say, for example, that we want information about sports-related injuries. We could search for the phrase, "sports-related injuries," but that would leave out documents that say "injuries due to sports." Instead, we may use the Boolean operator "AND" to link together the concepts "sports" and "injuries."
This could be expressed in a diagram:
 
 
 
 
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