SEARCH ENGIN

ES AND

BOOLEAN O

PS.

QU

I NT

I N L

UN

SF O

RD

SEARCH ENGINES

Google

Yahoo

Bing

Ask

SEARCH ENGINES EXPLN.

Search engines are programs that search documents for

specified keywords and returns a list of the documents

where the keywords were found. A search engine is really

a general class of programs, however, the term is often

used to specifically describe systems like Google, Bing

and Yahoo! Search that enable users to search for

documents on the World Wide Web.

BOOLEAN OPS

Boolean operators define the relationships between words or groups of words.

AND Narrow search and retrieve records containing all of the words it separates.

ORBroaden search and retrieve records containing any of the words it separates. The | can be used instead of 'or' (e.g., 'mouse | mice | rat' is equivalent to 'mouse or mice or rat').

NOT Narrow search and retrieve records that do not contain the term following it.

( ) Group words or phrases when combining Boolean phrases and to show the order in which relationships should be considered: mouse or mice