Understanding how to perform sophisticated searches of online information will greatly increase your chances of finding what you want. Popular search engines let you define search criteria in very specific ways, but not all function identically.
Although search engines like Bing, Google and Yahoo! index billions of web pages and other electronic documents, this represents only a tiny part of the total information available on the World Wide Web.
To unearth the buried treasure, understand how to mine the data.
Gopher, FTP, WAIS, Archie, Veronica, Jughead are older tools for searching and retrieving files on the Internet. With the development of the World Wide Web, you really don't need to know the gory details of how to use these anymore, but in case you're interested, find out.