Library:Library Research Skills For Biologists/Module 3/3B Catalogue/Page 03

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You can make your keyword searching even more POWERFUL using Boolean Logic. To start, there are two Boolean operators with which you should be familiar:

OR AND


OR/or

This operator serves to broaden a search by capturing synonyms or variant spellings of a term. If you want to find any of the following words in the search, use the Boolean operator OR. Example: barnacles or thoracica or balanus or balanidae


OR1.jpg


In other words, use synonyms for your concept joined by the OR operator.


AND/and

This operator narrows a search by capturing two or more ideas or concepts. If you want to find both of the following words in the search, use the Boolean operator AND. Example: barnacles and ecology

AND1.jpg