HP21

scientific RPN calculator

2.9 par Milan Cisár
May 7, 2019 Anciennes versions

À propos de HP21

Beauté de la RPN avec l'une des premières calculatrices Hewlett-Packard - HP 21.

The HP-21 was a scientific calculator produced by Hewlett-Packard between 1975 and 1978. It was designed as a replacement for the HP-35, and was the first from so called Second Generation Handheld Calculators.

As with most HP calculators then and now, the HP-21 used RPN entry logic, with a four-level stack. It also had a single user-accessible memory register. A shift key provided access to functions whose legends were printed on the fronts of the tall trapezoidal keys.

To enhance practical usability, display was modified to show both X and Y register. Also I have eliminated mechanical DEG/RAD switch and moved the function under DSP button.

HP21 has few big enough buttons to be used comfortably on mobile devices.

Quoi de neuf dans la dernière version 2.9

Last updated on May 8, 2019
Re-compiled to support Android 9

Informations Application supplémentaires

Dernière version

2.9

Telechargé par

Jonh Cruz

Nécessite Android

Android 2.1+

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Use APKPure App

Get HP21 old version APK for Android

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Use APKPure App

Get HP21 old version APK for Android

Téléchargement

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