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The Elektronika MK-61 ((ロシア語:Электро́ника МК-61)) is a third-generation non-BASIC, RPN programmable calculator which was manufactured in the Soviet Union during the years 1983 to 1991. Its original selling price was 85 rubles. The functionality of the MK-61 is identical to that of the MK-52, except the MK-52 has an internal non-volatile EEPROM memory module, for permanent data storage and also has the capability of using external EEPROM modules. The MK-61 is functionally very similar to the MK-54, the B3-34 and B3-21 Elektronika calculators, all of which are renowned for having a very large number of undocumented functions. The MK-61 has 105 steps of volatile program memory and 15 memory registers. It functions using either three AA-size battery cells or a wall plug. It has a ten-digit (eight digit mantissa, two digit exponent) green vacuum fluorescent display. The MK-61 was in production from 1985 to 1993. Image:Main PCB front.jpg Image:Main PCB rear.jpg Image:Power PCB.jpg Image:MK-61.gif ==External links== *(1970s-1980s pocket calculators database ) *(Alfred Klomp's page on "Hacking the MK-61" ) *(How to calculate on the Elektronika B3-34 (and similar calculators) ) *(250 games for MK-52, MK-61 ) *(MK-Compiler ) easy programming on the MK-61 and MK-52. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Elektronika MK-61」の詳細全文を読む スポンサード リンク
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