Search+engine

A // Search Engine // is an online service that allows users to find information on the World Wide Web.
 * Search engines run in a browser window.
 * To search using a search engine, you type in keywords that relate to the topic of your search.

There are several popular search engines:
 * Google (the //most// popular search engine...)
 * Yahoo!
 * Bing
 * Ask.com
 * Dogpile (this one is actually a //meta-search engine//...more about that later)