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The first Russian pocket programmable calculator Year: 1977 .. 1981 ..
Power: 4 x D0.55 NiCd accumulators or adapter
Display: Red LED (early variant), fluorescent (later variant)
Price: 350 r. (1977-79), 190 r. (1980,81), 80 roubles (1981)
Features: RPN, programmable (60 steps), early models contain error: 9.9999999 + 10 = 120
Modifications: LED display (early) and fluorescent (later).
There are four known calculator steps for display and error correction (see table)
More images (click on the image to enlarge):
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