Meta-Search Engine
In a meta-search engine, you submit keywords in its search box, and it transmits your search simultaneously to most of the popular search engines and their databases of web pages. Within a short time, you get back a compilation of results containing matching sites from all the search engines queried. This can save you a lot of time and provide an overview of the kinds of documents out there matching and term, phrase in quotes, or set of terms and phases. No matter how good meta-search engine's sound they do not eliminate the need to learn how to search skillfully using at least a few web search engines.