TIM-100
The TIM-100 was a PTT teller microcomputer developed by Mihajlo Pupin Institute (Serbia) in 1985 (Ref.lit. #1). It was based on the Intel microprocessors types 80x86 and VLSI circuitry. RAM had capacity max.8MB, and the external memory were floppy disks of 5.25 or 3.50 inch. (Ref.literature #2, #3 and #4). Multiuser, multitasking Operating system was real-time NRT and also TRANOS (developed by PTT office). Fig.4. TIM designers from M.P.Institute-Belgrade, Wikimedia