High Quality Content by WIKIPEDIA articles! CER (Serbian: Цифарски Електронски Рачунар – Digital Electronic Computer) model 22 was a transistor based computer developed by Mihajlo Pupin Institute (Serbia) in 1967. It was originally intended for banking applications and was used for data processing and management planning in banks, trade and utility companies in Belgrade.Three CER-22 computers were purchased by Beobanka, Jugopetrol and BVK–Belgrade companies.