Tool that enables users to locate information on world wide web Uses keywords entered by users to find web sites which contain information(web pages, images, files etc) sought Examples – Google, Alta Vista

1. SEARCH
ENGINES

2. WHAT IS SEARCH ENGINE (SE)?
 Tool that enables users to locate information on world
wide web
 Uses keywords entered by users to find web sites which
contain information(web pages, images, files etc) sought
 Examples – Google, Alta Vista

3. How to get best results from
search engines?
Two Rules To Be Followed:
1. Google search tips & rules – help in getting right information
while using Google as SE
2. Boolean search guide – help in internet searches in general &
can be used in any website of portal

4. Google Search Tips & Rules
 Describe what you need with as few terms as possible
Example
[ weather delhi ] is simple way to find weather and is likely to
give better results than the longer [ weather report for delhi,
India].

5. Google Search Tips & Rules
 The OR operator
Example
 [ Tax amendments 2014 OR 2015 ] will give you results about
either one of these years.
 whereas [Tax amendments 2014 2015 ] (without the OR) will
show pages that include both years on the same page.

6. Boolean search guide….
 Built on a method of symbolic logic developed by George
Boole, a 19th century English mathematician
 Allows to combine words and phrases using the words AND,
OR, NOT (known as Boolean operators) to limit, broaden, or
define your search

7. Boolean search guide….
 AND operator matches documents where both terms exist
anywhere in the text of a single document
 The double ampersand symbol && can be used in place of the
word AND
Example
 To search for documents that contain "Listing rules" and “SEBI"
use the query: "Listing rules" AND “SEBI“

8. Drawbacks of search engines….
 Poor precision - List of retrieved documents contains high
percentage of irrelevant documents.
 Varied document quality -spider can't discriminate between
valuable documents and spams

10. Popular Search Engines

11. FIRST SE IN WORLD
 ‘Archie’ created in 1990
 By Alam Emtage student at Mc Gill university, Montreal
 Original name ‘Archives’ shortened to ‘Archie’

12. LAST BEST SE BEFORE GOOGLE
 ‘Alta Vista’ before Google arrived

14. THANK YOU