HP21 scientific RPN calculator
9.1 14
v2.9 di Milan Cisár
Su HP21
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.
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.
Aggiornamento HP21 2.9
Re-compiled to support Android 9
Leggi di Più
Caratteristiche HP21
Versioni Precedenti Altro
HP21 scientific RPN calculator
2.9
APK
May 8, 2019
3.78 MB
Requires Android: Android 2.1+
Screen DPI: 160-640dpi
SHA1: a89c07bd770de08bb99d0c98fd70c15dd78b20b7
Size: 3.78 MB
What's New:
Re-compiled to support Android 9
HP21 scientific RPN calculator
2.7
APK
December 14, 2016
2.28 MB
Requires Android: Android 1.6+
Screen DPI: 160dpi
SHA1: 645167c4dfd17c7afbbb2ab501d39fbffc00f898
Size: 2.28 MB
What's New:
2.7. Y^X complex result bug fixed (Error is shown for COmplex result)
2.6. touch area re-alligned to buttons properly - thank you Eric
2.5. Can enter number by EEX button directly
2.4. To improve usablity - now running in full screen
2.6. touch area re-alligned to buttons properly - thank you Eric
2.5. Can enter number by EEX button directly
2.4. To improve usablity - now running in full screen
HP21 scientific RPN calculator
2.6
APK
November 12, 2016
2.28 MB
Requires Android: Android 1.6+
Screen DPI: 160dpi
SHA1: 397b3b790da19f361f8bdcc216dd4d0824712fd6
Size: 2.28 MB
What's New:
2.6. touch area re-alligned to buttons properly - thank you Eric
2.5. Can enter number by EEX button directly
2.4. To improve usablity - now running in full screen
2.5. Can enter number by EEX button directly
2.4. To improve usablity - now running in full screen
HP21 scientific RPN calculator
2.5
APK
November 9, 2016
2.28 MB
Requires Android: Android 1.6+
Screen DPI: 160dpi
SHA1: 5152e09ed17fd82ddf4eb0c7cb5e1497311c8b30
Size: 2.28 MB
What's New:
2.5. Can enter number by EEX button directly
2.4. To improve usablity - now running in full screen
2.4. To improve usablity - now running in full screen
Maggiori Informazioni
Nome Pacchetto:
Data Aggiornamento:
2019-05-07
Ultima Versione:
2.9
Aggiornamento Necessario:
Requisiti:
Android 2.1+
Rapporto:
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