Search engines allow users to search vast databases of internet content. They work by using web crawlers to index website content and store it in a searchable database. When a user enters a search query, the search engine software returns relevant results from the database. There are three main parts of a search engine: the spider or web crawler that indexes content, the database index that stores the content, and the search software that returns results. Common types of search engines include general search engines that index all types of content, and specialized search engines that focus on specific topics, domains, or media types like images or video.

1. SEARCH ENGINE
SHWETA BHAVSAR
F.YM.LI.SC

2. SEARCH ENGINE
Definition:-
A program that searches for and identifies items in a
database that correspond to keywords or characters
specified by the user, used especially for finding particular
sites on the World Wide Web.
 The first tool for searching content on internet
was Archie.
 In 1990 by Alan Emtage, Bill Heelan
and J. Peter Deutsch,

3. A search engine is a computer program
that does the following:
Allows user to submit a query that
consists of a word / phrase.
Searches the database
Returns a list of suitable URLs which
match your query.
Allows user to revise and resubmit.
The search results are generally
presented in a line of results often
referred to as search engine results
pages (SERPs)

4. THREE PARTS OF SEARCH ENGINE
1.SPIDER OR WEB CRAWLER :-
"when the search engines spider your site they'll
find all of the pages"
2.INDEX:-
A database index is a data structure that improves the speed
of data retrieval operations and index all the data search by
search engine.
3.SEARCH ENGINE SOFTWARE:
Technology that enables users to query the index and
that returns results in a schematic order.

5. TYPES OF SEARCH ENGINE
oGENERAL OR SPECIFIC SEARCH ENGINE
oMETA SEARCH ENGINE

6. oGENERAL OR SPECIFIC SEARCH ENGINE
•General and specific search engine uses
spider to collect its information from their
own searchable index.
•Specific search engine having specific
subject.
• Although general search Engine is not
having any subject it searches all type of
information.

7. This search engine has been around for
many years and is one of the most widely
used.
The most widely used search engine.
GENERAL SEARCH ENGINES:-
:
Microsoft’s latest attempt at a
search engine.

8. Science.gov:
Search multiple science-oriented
government web sites. Covers most
science areas.
Science-Specific Search Engines
Business.com:
A search engine designed to help businesses
make purchasing decisions.
Social Sciences
Artcyclopedia
Search for fine art information. Search artists,
work titles, or by museum names/locations.
Arts & Humanities-Specific Search Engines
Images:
Pixsy Search images and videos.
picsearch Search over 3 billion pictures on the
web.
SCIENCE-SPECIFIC SEARCH ENGINES

9. Find Sounds:
Search for a wide range of sounds in
multiple formats.
podscope:
Search for podcasts (both audio and
video).
blinkx
Search over 35 million hours of video,
including music, television, and more.
Video:
Audio:

10. Searches multiple other search engines and
brings the top results. Search by category
and see recommended searches.
An early meta search engine. Allows for
searching by multiple categories.
METASEARCH ENGINES

11. HOW TO USE SEARCH ENGINE
•Use Quotes around the topic(“ ”)
•Maximize the use of Auto Complete.
•For broaden a search use Truncation (*)
•The tilde operator (~):
•For Narrowing The Result Use Boolean Operators( And
Or Not)
•Use the minus operator (-) to narrow the search
•Direct search site
•Related sites: For example, related:www.youtube.com

12. Disadvantages:-
•Information is overloaded
•Privacy and security is concern
•Makes everyone to depended
•Cannot index the entire web
Advantages:-
•Enable to quick search to vast amount information
from one search box.
•Search on specific information.
•Useful for researcher.
•Good for searching on narrow topics.
•Stores millions of pages on database

13. • http://liblearn.osu.edu/guides/searchengines.html
•https://www.google.co.in/
•https://www.slideshare.net/
•//www.quora.com/
REFERENCES:-