Retro Review: HP 20S and HP 21S

[Eddie W. Shore]

Spoiler alert: they are awesome. I wish HP kept producing these two models.

http://edspi31415.blogspot.com/2017/04/r...s-and.html

[nsg]

Just these two? Don't you wish HP kept producing some other awesome models?

[Dan B]

I have one of each model in excellent condition and they are great! I keep thinking I should sell them since I'm a RPN guy, but I bought them because I can't resist that form factor and key layout!

[Gene]

I believe a user can key in the time value of money program from the 21S into the 20s and it will work as-is.

As you mention, you just cannot save it into permanent memory. Only the "continuous memory" in the machine.

[Eddie W. Shore]

(04-08-2017 12:26 AM)nsg Wrote:  Just these two? Don't you wish HP kept producing some other awesome models?

Not just. The 48 G+, in 48 SX colors comes to mind. Also, 42S, 15C, 11C, and 41C.