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"Carat" computer modules
The block of the "Carat" computer
"Carat" computer modules

";...The "Carat" family of installed computers, developed under Vilen Plotnikov management, was the first in the Soviet Union broadly used in navy radio-electronic systems. The important indicator of computer perfection is mean-time-between-failures which consisted more than 2 000 hours (almost 100 days) for the first "Carats" and more than 10 000 hours (almost 5 years) for the next modifications. At the beginning of 70-s these figures seemed to be fantastic. But computers used in surface ships and submarines and operating under conditions of high humidity, great temperature fluctuations, weight overloading required this very reliability. "Carats" passed the exams: many computers had operated on board for 10-15 years without a single failure! Within these years more than 2 000 computers were manufactured at the plants of Ukraine and Russia! They were used in systems of sixty modifications..."

The displayed block of the "Carat" magnetic operational memorizing device with well seen memory cube and microchips "Varduva", "Vetla", "Ispolin" etc.
Processor cassette
"Carat" computer modules

Computer "Carat" processor cassette on display, multicrystal chips "Varduva" (series 240) are seen. 1971

"Carat KM-E" computer modules
Exchange and break unit
"Carat KM-E". Exchange and break unit 21 k
Processor
"Carat KM-E". Processor 22 k
Constant and operational memory
"Carat KM-E" computer modules 24 k
"Carat" computers are intended for data processing, operation and control
"Carat KM-1" computer system MP4.10. Vilen Plotnikov - Chief designer of "Carat" computers family with Svitlana Dovgal - software deputy Chief designer of "Carat" family computers after one of the modification "Carat" computers was launched