SLP

Serial Line Internet Protocol. A standard Protocol used to establish connections over dial-ups.

SSH

Secure Socket Connection. An method used to safely connect from one computer to another with all data transferred between them encryted. This is very popular with UNIX systems.

SSL

Secure Socket layer. A method used to encrypt data from a computer to a webserver.

STM

Synchronous Transfer Mode. A transmission process by which information is transmitted sequentially with respect to time.