Search Engine :
A search engine is an information retrieval system designed to help find information stored on a computer system. Search engines help to minimize the time required to find information and the amount of information which must be consulted, akin to other techniques for managing information overload.
The most public, visible form of a search engine is a Web search engine which searches for information on the World Wide Web.
Function :
Search engines provide an interface to a group of items that enables users to specify criteria about an item of interest and have the engine find the matching items. The criteria are referred to as a search query. In the case of text search engines, the search query is typically expressed as a set of words that identify the desired concept that one or more documents may contain
Examples :
Yahoo
Google
Alta vista
Hot bot
Task :
1. Find what is central processing unit (cpu) – copy & paste in MS Word
2. Find images of : monkey, bird, fish, map of
3. Download any video
4. Download any audio