HP and RPN calculators for old mobile phone, J2ME, Symbian, game console, etc.

[HPing]

hpfactor.com lists several RPN calculators for Windows CE, Windows Mobile... For example:

* Emu48CE 1.23 Release 2
https://www.hpcfactor.com/scl/1949/HPCal..._Release_2
https://www.hpcfactor.com/forums/forums/...13&start=1
https://web.archive.org/web/200402032220.../emu48.htm

* Emu48CE 1.1
https://www.hpcfactor.com/scl/300/HPCalc...ersion_1.1
http://www.threaded.com/Emu48ceH41.htm

*RPN Calculator by Tom Boldt
is a reverse polish notation programmable calculator for science and engineering. It supports well over 200 functions and 11 data types (real, integer, variable, vector, matrix, list, program, unit, complex, character strings, and tags). The stack, variables, and programs can be saved and reloaded.
https://www.rpncalc.ca/rpncalc.html

*Proficiency RPN Calculator 1.2
It provides functional emulation of Hewlett-Packard Company's HP-12C financial calculator, most of the HP-15C engineering/scientific calculator and portions of the HP-16C computer science calculator.
https://www.hpcfactor.com/scl/363/MVA_So...ersion_1.2

*PocketBizCalc 1.0
12c emulator
https://www.hpcfactor.com/scl/1465/Odyss...ersion_1.0

* Pocket Bizcalc 4.0.0.7 by Odyssey Computing
https://www.hpcfactor.com/scl/313/Odysse...on_4.0.0.7