High Quality Content by WIKIPEDIA articles! IBM 3767 Communication Terminal is a serial printer terminal that employed wire matrix print-head technology and, for the first time, the Synchronous Data Link Control (SDLC) communications protocol set under IBM`s Systems Network Architecture(SNA). It was introduced in 1974 and was used widely during the late 1970s to 1990s, for attachment to IBM System/360 and System/370 mainframe computers.