Boolean Logic
The Internet is a vast computer database. As such, its contents must be searched according to the rules of computer searching. Database searching is based on the principles of Boolean logic. Boolean logic refers to the logical relationship among search terms.
Boole used words that he called logical operators to define searches. Boolean logic consists of three logical operators. (Near can also used to make searches more specific):

Click the three logical operators above for more information.
Click here for links to pages with information on Boolean Logic and Boolean Algebra
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