* Telnet (telecommunications network) is a terminal emulation protocol that allows you to connect your computer to remote web servers.  Telnet is a valuable program that enables the user to access many different servers on a network.  The user most log in and use a password that will connect him to the server.  Once connected the user can interact with the server from his personal computer.
Telnet is explained in detail at this fabulous website: TELNET Protocol.  Many libraries throughout the world allow access to their OPAC (online public access catalogs) using telnet.

Shareware programs are available online. Some Internet Service Providers may provide QVTNET or TRUMPTEL for telnet access.

For a complete description of how telnet uses NVT (network virtual terminal) and required control codes access this site.