FTP Protocol Overview
Very brief (1 page) overview of FTP. Part of "Connected: An Internet Encyclopedia"

FTP: File Transfer Protocol
Reference manual aiming to describe how FTP actually works (and doesn't work) in practice.

FTPLab.Com
How to choose an FTP program. About tasks which can be performed by a special program called FTP Clients.

FTPmail: FTP by email
FAQ describing how to download from ftp sites with email.

The Internet and FTP
One of the most useful services of the Internet is FTP, or File Transfer Protocol. This paper describes the client/server environment and explains FTP conventions and issues.