Talk:HP-20S

Infix rather than RPN

Is it correct tht the HP-20S and 21S are the only HP scientific calculators to use infix rather than RPN? As far as I know, it is true, but I don't want to state that in the article w/o confirmation. Bubba73 (talk), 22:44, 11 October 2006 (UTC)

I think the HP-38S also uses infix notation. It's one of their latest offerings. Sadly, it seems that RPN is being phased out. :( Itub 21:19, 13 October 2006 (UTC)

I've had a 20S since junior high (though I later got a 48G). It supports both infix and RPN. IIRC, RPN was the default. I found it very useful, since none of my classmates (or at least, none of those who habitually forgot their own calculators) could figure it out, so they soon stopped asking to borrow it. That was a mixed blessing, though; I didn't mind when girls asked to borrow my calculator. DES (talk) 08:21, 22 March 2011 (UTC)

HP 20S

I work as a technicians and I need a new HP-20S. But where can I buy this? I need it for work, so please help!

I have four of them. Two I bought new from stores, two I bought on e-bay. One of them was new and the other was line new. Try e-bay. (I'm not going to part with any of mine.) Bubba73 (talk), 03:51, 14 October 2006 (UTC)

Mine is from 1987, so the year of introduction is inaccurate.. — Preceding unsigned comment added by 212.10.109.165 (talk) 00:31, 9 June 2015 (UTC)