Mainframe computers

computers used primarily by large organizations for critical applications

BESM (БЭСМ) is the series of Soviet mainframe computers built in 1950–60s. The name is an acronym for "Bolshaya (or Bystrodeystvuyushchaya) Elektronno-schotnaya Mashina" ("Большая электронно-счётная машина" or "Быстродействующая электронно-счётная машина"), meaning "Big Electronic Computing Machine" or "High-Speed Electronic Computing Machine". It was designed at the Institute of Precision Mechanics and Computer Engineering

Russian supercomputer

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first mainframe computer manufactured serially in the Soviet Union

Small computer to which a large mainframe computer delegates input/output or telecommunications functions

high-performance input/output architecture

machine designed to support time-sharing

digital computer

BS2000 is an operating system for IBM 390-compatible mainframe computers developed in the 1970s by Siemens (Data Processing Department EDV) and from early 2000s onward by Fujitsu Technology Solutions.

mainframe computers manufactured from 1959 to 1975