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In 1976 I bought this and was quickly disappointed by the cheap build quality, compared to the SR-51A. Also, I was starting to itch for a programmable calculator. I sold this one soon after. Now I have a TI-55 which has all the same functions, more memory, simple programmability, less precision and the same build quality.

Datamath Calculator Museum
R/S Programmable Calculators

From the album:

70's Computing

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