Bol'shaya (or Bystrodejstvuyushchaya) Ehlektronno-Schetnaya Mashina - Big (or High-speed) Electronic Calculating Machine
, designed in 1965 at the ITMiVT
. Reputedly the last indigenous Russian
computer that performed on a par with its Western
counterpart, the Control Data
supercomputer. More than 350 BESM-6s were
built. The last of them were taken out of service in the early 1990s.