The TIM-100 was a PTT teller microcomputer developed by Mihajlo Pupin Institute (Serbia) in 1985, part of the TIM series of microcomputers.[1]
It first appeared in Belgrade post offices in 1985. Around 1,000 TIM-100 computer systems were produced for Serbian PTT.
The machine was based on the Intel 8086 microprocessor types 8086 and VLSI circuits and had a real-time multi-user and multitasking operating systems (NRT and TRANOS, developed by PTT office).