Top three calculators ?

[JeanMichelFleur]

The three top Hewlett-Packard calculators are User-RPL programmable and the pinnacle of HP Corvallis best products:

1. HP-28C
2. HP 48SX
3. HP 50g

Go ahead and verify that when introduced in 1987, HP-28C was the first computer to let you use the object oriented programming paradigm for the first time: using the new user Reverse Polish Lisp, while running Sys-RPL internally that could be accessed via SYSEVAL.

Also when HP-48SX introduced TIME, DATE and TSTR commands as well as alarms.

Finally, after improving the horrendous HP 49G keyboard defects, HP 50g included all previous commands including dual ALGebraic and RPN entry modes with the RPL> command (to rule them all in User-RPL while in ALG entry mode) since ROM version 1.05.

See User RPL programming in algebraic mode.

All of us are thankful of the titanic efforts from Corvallis Division and their legacy being preserved by the HP Museum and HP Calculator Archive created by Eric Rechlin.

If Christophe Dinechin could convince SwissMicros to make a mutually beneficial strategic alliance for running his DB50X masterpiece on the non existent calculator DM50 hardware with a non touchable color display, I would tell them: “Shut up and take my money!”