Media Media is the realm of sounds and graphics. This is useful if instead of looking for a certain information, you're just looking for a picture or sound. Usenet Basically Usenet is the rumor mill on the Internet. The information contained there is not only vast, but also timely. However, depth is usually not found there.
Some search engines pulls documents indiscriminately.
Others tries to rank them according to relevance, making them a more useful search engine. The speed of the search, influenced by network speed and connection, as well as the database engine. This evaluates the thoroughness of the database. Very useful if you're looking for some obscure information. Let's take a few tutorials to illustrate how you can use these search engine to the fullest.