The Internet is dynamic. There is no comprehensive search engine for the Internet. Robotic software programs traverse Internet sites using predetermined criteria to identify sites. Information retrieved by the robot is copied to the search engine site for subsequent development and generation of the search engine indexes.
Some robotic programs attempt to be comprehensive while others are selective.
Other Internet indexes utilize human intervention to evaluate, categorize, and select sites. Study the documentation provided to learn to effectively use the search engine. DirectHit based on popularity Excite e specially good for popular information and news access. Google based on popularity of the frequency with which other pages link to a specific page. HotBot f orms based search engine HotBot Advanced Search s upports some field searching including link .