How Do Search Engines Work?
Date: Fall 2011
How does a search engine like Google work?
Search engines employ "web crawlers" (which are a kind of program) that
visit all the web sites on the Internet, read the content of the web pages,
and index the context for quick retrieval. In order to give fast response
times, search engine companies employ tens of thousands of computers that
work together to provide a search result. These servers are geographically
distributed throughout the world so that when you type in your search, it is
services by a computer that is relatively close to you.
Scott P. Smith
Click here to return to the Computer Science Archives
Update: June 2012