MK
MEP
Ministry of
Electronics Industry
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Key
Reported, but no picture available.
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MK-Series Machines
MK-40
A printing machine!
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MK-41
Have you ever seen circular ICs? This machine has them, and they're beautiful!
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MK-42
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MK-44
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MK-45
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MK-46
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MK-47
The only known picture of the only known Soviet calculator which uses magnetic cards for program and data storage. Wow.
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MK-51
A very compact little calculator - quite like the Casios of similar size and function of the early 1980s. The keyboard is impressive, one of the nicer feeling keyboards I have used. Powered by a single button-cell battery labeled CR-2325.
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MK-52
This magnificent machine takes plug-in ROM and RAM modules.
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MK-53
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MK-54
 "And, at last, elite of calculators world - programmable calculators. Here first place unconditionally belongs MK-54. Having all dignities hot liked B3-34, this calculator on 20 rubles is cheaper (at the expense of
power supplies of other type)." - Science & Life
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MK-56
 MK-56 is desktop version of the MK-54 (B3-34)
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MK-57
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MK-57A
 Produced in 1992 and could not be sold until
two crazy guys (Igor from Moscow and Andrew from Sydney) buy them. Because Soviet Union
was broken on December 7 (or so), 1991 they represent the first Russian calculators (or maybe the last Soviet ones, it depends on point of view...).
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MK-57b
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MK-59
Elektronika MK 59 (1991)- big one, desktop - Jacek Lyzwa
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MK-60/M
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MK-61
 The MK-61 has 105 merged program steps, no auto-shut-off, no continuous memory, 15 registers, no insert-mode programming, only
scientific notation decimal display (with a form of hexadecimal display).
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MK-62
 An actual MK-62 - my earlier images were from a reconstruction, which you can see on the MK-62 page. Did I do a good job?
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MK-71
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MK-72
 An experimental machine, almost a computer. Used in schools.
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MK-77
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MK-85/M/C
 Gregory gives a huge amount of detail, including some amusing comments about the BUG in his particular calculator! There is a secret military version of this machine, the MK-85C.
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MK-87
 A machine never released to the general public. Only 7000 units made!
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MK-90
 The most powerful Soviet calculator ever made, and it cost an absolute fortune! This machine was extremely difficult to find.
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MK-91
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MK-95
 Not so secret anymore! There are only two of these machines known to exist!
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MK-98
 A surprise-find. A much-improved MK-90 variant.
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MK-104
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MK-107
 Possibly the last (by model-number!) Soviet calcualtor!
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