RPN calculators

 

remake of vintage calculators from those old good days


rpn calculators are set of simulators of vintage hp calculators. Internally, they are exact copies of the originals with the same speed, the same numeric accuracy and the same programming capability. Modern appearance is intended to provide convenient use of calculators on iPhone.


Currently eleven calculators are available. Feel free to send comments, questions and bug reports to rpn-calcs AT bartosiak.org

How to use vintage hp calculators?


Unfortunately I’m not able to provide documentation for HP calculators, but there are many useful resources on the Internet. Here is some useful links:


  1. HP Museum – best place to start learning about HP calculators.

  2. HP–35 Saga by Jacques Laporte. Good place to learn what is going on inside calculator.

  3. Online manual for HP-35

  4. Kees van der Sanden’s site with description of all HP calculators and many links to web sites of private collectors around the world.

rpn–35

hp’s first pocket calculator

rpn–45

the first scientific calculator

rpn–55

programmable with timer

rpn–80

the first business calculator

rpn–21

simple scientific calculator

rpn–25

programmable scientific

rpn–32e

scientific

calculator

rpn–33c

scientific programmable

rpn–34c

programmable with integration

& solve

rpn–37e

financial

calculator

rpn–38c

programmable financial

DISCONTINUED
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