Carnegie Vincent Library : Boolean Searching

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Boolean Searching

AND	OR	NOT
two keywords, terms, or concepts that must be together in the same source	two keywords, terms, or concepts that could be together in the same source, but only one might be in a particular source	two keywords, terms, or concepts where one keyword, term, or concept cannot be in any source with the other one
use when you get too many results	use when you don't get enough results	use when there is a particular type of result which you don't need

See these diagrams, which illustrate each type of search:

[AND]

[OR]

the search "girl NOT boy" is represented below:
[NOT]

how would the search "boy NOT girl" look?