High Quality Content by WIKIPEDIA articles! TIM-100 was a PTT teller microcomputer developed by Mihajlo Pupin Institute (Serbia) in 1985. 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. Multiuser, multitasking Operating system was real-time NRT and also TRANOS (developed by PTT office).