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Information Skills: Searching

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Boolean operators AND OR NOT

Boolean operators enable you to structure your search question in a way that can be interpreted by computers and database software.  Boolean operators are AND, OR, NOT.  The effect of AND, OR, NOT is explained in this guide.

Guide to Boolean operators AND OR NOT

Boolean AND OR NOT

A short animation on Boolean AND OR NOT

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Boolean AND

A short animation on Boolean AND

YouTube may be blocked on some NHS computers. 

Boolean OR

A short animation on Boolean OR

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