HP Forum Archive 19

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RPN for Kids and Poor Guys Message #1 Posted by Joerg Woerner on 4 Dec 2010, 5:42 p.m. The famous HP-35 was neither the calculator for kids nor the choice of poor guys. And now look at these two RPN calculators introduced in 1975: The Unitrex 90SC assembled in Hong Kong and not really a high-quality product. The WhizKid Edition of the National Semiconductor Model 600 obviously named with kids in mind. Well, times changed! Have a great weekend, Joerg

Re: RPN for Kids and Poor Guys Message #2 Posted by Walter B on 4 Dec 2010, 7:00 p.m., in response to message #1 by Joerg Woerner The Whiz Kid does it even without an ENTER key - must be either witchcraft or a bit too poor ;) (Well, I know you can start with a cleared calculator and use + to terminate the first number entry. If that little wizard comes to a point where it needs a single parenthesis, however, the end is near ... ;)

Re: RPN for Kids and Poor Guys- What Memories! Message #3 Posted by John Stark on 5 Dec 2010, 12:03 p.m., in response to message #1 by Joerg Woerner The Unitrex 90SC was my FIRST "Scientific" calculator, long before I could afford any of the HP line. Considered it a vast upgrade from my K& E Slide Rule in 1976. I have stuck with RPN in one form or another ever since. My technical and economic migration took me through: - National Semiconductor Mathemetician - HP.25 (PROGRAMMABLE !) - HP.29C (RETAINS PROGRAM IN MEMORY!) - HP.35 (Traded HP.25 for it; liked classy case design) - HP.67 (UNIVAC on a Stick and IN YOUR POCKET! - Still have that beast) And a small but growing collection of Classics today. Thanks so much for the memory refresh. Sure is amazing how things have changed today. Cheers to all.. John Stark

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