FTP (file transfer protocol) sites store pieces of software that can be accessed from the Internet. If you’ve heard of FTP at all, it was probably under one of two circumstances—either you’ve downloaded software from an Internet FTP site, or you’ve created and maintained your own Web site.
Hooking into an FTP site generally requires an FTP client program that runs on the kind of computer you use (Mac, Windows, or whatever). On OS X, popular FTP client programs include the shareware programs Transmit, Fetch, Interarchy, and Captain FTP, and the free RBrowser (which is available from the “Missing CD” page at www.missingmanuals.com).
Using these programs, Web designers, for example, can view a list of all the text and graphics documents, sitting there on an Internet-connected computer somewhere, that make up their Web pages. The effect is shown in Figure 21-1.