CER-22
# CER-22

CER (Serbian: Цифарски Електронски Рачунар – Digital Electronic Computer) model 22 is a transistor based computer developed by Mihajlo Pupin Institute (Serbia) in 1967-1968. 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. (For more details see: Ref.# 1, #2, #3, and #4).

The principal designers and chiefs of the project teams were:

* Dušan Hristović, Svetomir Ojdanić, Veselin Potić, Radivoje Ilić et al. for Beobanka;
* Dr Sc. Miroslav Jocković, Branimir Leposavic, Michael Savikin, Ljubivoje Marković et al., for Jugopetrol co.;
* Vladislav Paunović, Miloš Marjanović, Petar Vrbavac, Dragiša Tinković et al. for BVK-Belgrade.

## Technical characteristics of the CER-22

* Technology: IC (MSI), transistor and diode logic circuits (See also: Ref. #2, #5, #6).
* Printed circuits boards with the ribbon connectors;
* CPU performance: the 16-cycle instructions (10 microseconds);
* Magnetic core memory: 32 KB capacity (memory cycle time of 2 microseconds);
* Disk storage CDC-854 (max 8 disk units);
* Card reader and puncher: 300 cards/min and 150 cards/min;
* Paper tape reader and puncher, type "Facit": 1000 characters/s and 150 characters/s;
* Parallel Line Printer, type DP MZ-4: 128 characters/line, 600 lines/min.
