54788
The Elektronika MK-52 calculator ( using the extended B3 - 34 command set , and featuring internal EEPROM memory for storing programs and external interface for EEPROM cards and other periphery ) was used in Soviet spacecraft program ( for Soyuz TM-7 flight ) as a backup of the board computer .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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