search engines

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A  search engine is a program system that is designed to search for information on the World Wide Web. 

search engine 

How to use search Engines????

For example:: Type www.google.comin internet explorer: search in the blank space

Search engine consists of:

1.The crawler2. the index3.The search

algorithm

BOOLEAN OPERATORS.

Boolean Operators are simple words (AND, OR, NOT or AND NOT etc) used as conjunctions to combine or exclude keywords in a search, resulting in more focused and productive results.

Boolean Operators

AND—requires both terms to be

in each item returned. If one

term is contained in the document and the other is

not

stock market AND trading

stock market AND trading

OROR—either term (or both)

will be in the returned document.

ecology OR pollution

NOT or AND NOT ( dependent upon the coding of the database's search engine)—the first term is searched, then any records containing the term after the operators are subtracted from the results.

NOT or AND NOT

NEARUsed to in order to specify how close they are.

Using the ( ) to enclose search strategies will customize your results to more accurately reflect your topic.

Nesting.

(smoking or tobacco) and cancer

“Quotations”

To find particular phrase

"internet explorer" AND "netscape navigator"

USE CAPITAL LETTERS

FOR BOOLEANOPERATION

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