A Macintosh utility program that provides the TCP/IP support needed to connect to the Internet. A separate communications program is needed to connect via Serial Line Internet Protocol (SLIP) or Point-to-Point Protocol (PPP).

a program used on Macintosh computers to provide socket connections for SLIP and PPP connections.

The most common TCP/IP stack used on Macintosh computers.

TCP/IP protocol stack for the Macintosh. MacTCP along with a PPP, SLIP, or direct connection allow you to access the internet.

an extension that enables your Macintosh to connect to the Internet.

Macintosh implementation of TCP/IP, superseded on Power Macintoshes by Open Transport; a control panel on 68- series Macs where network connection details can be changed.

The software driver for the Macintosh operating system that implements the TCP/IP protocols. These protocols provide transmission services that are used by third-party applications such as electronic mail, remote login, file transfer, and database access.

TCP/IP for the Macintosh. Not very interesting except that you can't put your Mac on the Internet without it.