TCP. See Transmission Control Protocol.
terminal emulation. A program that makes a PC or other computer act like a terminal.
transceiver. A modular interface to the LAN medium. Also called a medium attachment unit (MAU).
Transmission Control Protocol (TCP). A transport level, connection-oriented protocol that provides reliable end-to-end message transmission over an internetwork.
TTY. Acronym for teletype. Historically, UNIX terminals have been called TTYs because teletypes were used when UNIX was first developed.
twisted pair. A pair of small wires twisted together to minimize interference from other wires in the cable.