Search engines
A query that uses an automated program called Spider or Robot aggregates information about sites on the internet and stored in a database. The database is large Showing results from a query in the query, so it is appropriate for a general information.
Search engines are popular and well-known, such as Yahoo! Search (http://www.yahoo.com), Google (http://www.google.com), MSN Search (http: //www.msn. com) and Ask (http://www.ask.com) and so on.