A search engine is a system designed to find information on the web using keywords and boolean operators. These operators (such as AND, OR, NOT) help refine search results by combining or excluding terms. Proper use of these operators and grouping can lead to more precise search outcomes.

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

5. For example:
: Type
www.google.com
in internet
explorer
: search in the

10. 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

11. AND—requires both terms to be
in each item returned. If one
term is contained in the
document and the other is not

12. stock market AND trading
stock market AND trading

13. OR
OR—either term (or both) will be in the
returned document.
ecology OR pollution

15. 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

19. Using the ( ) to enclose search strategies will
customize your results to more accurately
reflect your topic.
(smoking or tobacco) and cancer

21. To find particular phrase
"internet explorer"
AND "netscape
navigator"