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Steve Simpkin · (This post was last modified: 04-28-2024 06:52 PM by Steve Simpkin.)

(04-28-2024 05:31 PM)Thomas Klemm Wrote:
(04-28-2024 05:07 PM)Steve Simpkin Wrote: Edit: The following comparison table may or may not help:

Fixed the link: Calculator Comparison: HP-11C HP-15C HP-16C HP-10C HP-12C

Thanks Thomas Smile

I think the HP-10 model number may be the most overloaded HP model number used where the different models have nothing to do with each other.

HP-10 -- Handheld Printing Adding Machine.
HP-10C -- Basic Scientific Programmable Calculator.
HP-10B -- Basic algebraic business calculator. Followed by the HP 10bii.
HP 10bii+ -- Basic algebraic business calculator with scientific functions. Still in production.
Here is a nice video comparison of the HP-10B, HP 10bii and HP 10bii+: HP 10BII+ Financial Calculator Review

The HP-27 and HP-27S were substantially different in their function set but were somewhat related in their "do-everything" philosophy.
"The HP-27S was another "do-everything" calculator. While it was called a "Scientific Calculator" it also had statistics, Time Value of Money with loans, savings and amortization schedules, plus date arithmetic, time and appointments. Like the first "do-everything" model, the HP-27, the HP-27S didn't do programming."