Click to search the Andrew Heiskell Braille and Talking Book Library Skip Navigation

All NYPL locations will close at 3 PM on December 24 and will be closed on December 25.

Your Library Needs You!

For Teachers

What is Boolean Search?

Share

Boolean searching is built on a method of symbolic logic developed by George Boole, a 19th century English mathematician.

Boolean searches allow you to combine words and phrases using the words AND, OR, NOT (known as Boolean operators) to limit, broaden, or define your search. A good researcher should know how to do a Boolean Search.

 

"AND" logic

 

AND : Using AND narrows a search by combining terms.

 

 

 

"OR" logic

 

OR : Using OR broadens a search to include results that contain either of the words you're looking for.

 

 

 

"NOT" logic

 

NOT : Using NOT will narrow a search by exclusion. (Some search engines, like Google, recognize the minus (-) symbol, instead of the word NOT).

 

 

Quotations : Placing quotations around a specific phrase will help you narrow results in order to find information containing that exact wording.

Boolean Searching on the Internet
http://www.internettutorials.net/boolean.asp

Power Searching with Boolean
http://www.butterscotch.com/tutorial/Power-Searching-With-Boolean

Comments

Patron-generated content represents the views and interpretations of the patron, not necessarily those of The New York Public Library. For more information see NYPL's Website Terms and Conditions.

Post new comment