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Greatest scientific pocket calculator in 1975?
07-02-2019, 08:22 PM
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Greatest scientific pocket calculator in 1975?
Well, according to Hewlett-Packard, it was the programmable HP-55. Not only did it have 20 addressable data storage locations, 86 keyboard functions ("more than any other scientific pocket calculator"), but it also featured "more pre-programmed functions than any other other scientific pocket calculator in the world." Including a Last X register! And a precision timer to boot, with the ability to store times while the timer was running and later recall them.

Still, most people haven't ever seen or touched an HP-55. So, if you're curious, give RPN-55 SD (for the iPhone) a try. Check it out at cuveesoft.ch/rpn55 .

Willy Kunz
CuVee Software
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Greatest scientific pocket calculator in 1975? - Willy R. Kunz - 07-02-2019 08:22 PM



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