M series (computer)

M-20, M-220 and M222 were a range of general-purpose computers designed and manufactured in the USSR. These computers were developed by the Scientific Research Institute of Electronic Machines (NIIEM) and built at Moscow Plant of Calculating and Analyzing Machines (SAM) and the Kazan Plant of Computing Machines (under the Ministry of Radio Industry of the USSR).

The operating system provided batch processing and simultaneous execution, subsequently enhanced to provide a multitasking mode.

• OS4-220 – for the М-220
• DM-222 – for the М-222

• FORTRAN – an optimized ALPHA translator – by A.P. Ershov
• ALGOL 60 – compiler
• ALGOL 68 – compiler, written in ALGOL 60

• The Association of M-20 Users – a M-20 software distributor

• L.N. Korolyov. The computer structures and their software base. Moscow, Nauka, 1974.
• Electronic digital computation machines for general purposes. Vol. 4. NII EIR Publication, 1972.

• http://www.computer-museum.ru/english/m220.htm