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The SM-1420 (CM-1420)was a PDP-11/34+ clone, and the successor to SM-4 in Soviet Bloc countries. It was produced in the Soviet Union, Bulgaria and East Germany.

The standard package included 256KB MOS memory, two RK-06 disks, 2xTU-10, CM-6315 barrel or DZM-180 dot-matrix printer, Mera VT-52 compatible or VTA-2000-15 (BTA 2000-15) VT-100 compatible terminals. Some 1420's were produced by the UK company Quest Automation Plc.