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There are millions of web pages on the web. To search a particular information by viewing each web page
in the ocean of web pages, one would have to spend a lifetime. It is quite challenging for someone to find
exactly what he/she is looking for without using a search engine.
Some popular search engines and their URLs are:
Search Engine URL Related To
Google https://www.google.com It searches information based on keyboards.
Bing https://www.bing.com It searches information based on keywords.
DuckDuckGo https://duckduckgo.com It does not have search index and data of their own.
It is a popular hierarchical index search that makes
Yahoo! https://www.yahoo.com
searching the web simple and fun.
It is based on questions that a user ask and another
Ask https://www.ask.com
user give answers.
Internet Archive https://archive.org It helps the user to search the history of web pages.
To search for a web page for specific information using a search engine:
When a person wants to get a particular information but does not know the site’s URL, search engines
assist as a personal guide to search the required information on the Internet.
Category of Search Engines
Search engines can be categorised in two types:
1. Directory based: A directory based search engine helps us to search information by selecting
categories of a subject matter. The directory separates subjects into general categories (such as music)
which are divided into sub categories (such as music-guitar-musical instrument suppliers). Once a
category is selected the directory displays a list of web sites that provide contents related to that
subject/ category. It is similar to card cataloging in a library.
Such types of search engines can quickly locate information as if the user is looking for an encyclopedia
or a card catalog in the library. Examples of some directory based search engines are www.looksmart.
com, www.yahoo.com, etc.
26 Touchpad Computer Applications-X

