I've had 'em all. The 35, 45, 21 (my all time favorite), 41 (with ALL the attachments which died a few years ago...but I wasn't using much anymore), the workhorse 9825's (which always ended up on my desk) and the two 32S's which roam around my domicile now in my retirement. The one thing I have never been able to understand is why HP refused to challenge TI in secondary education. My wife is a teacher of mathematics and so I am familiar with all the recent iniatives in the teaching of high school math. Almost all the recent textbooks are geared to the use of the TI calculators (graphing or not) and frequently include a tutorial TI operation appendix. I cannot believe that the secondary school mathematics teachers have so completely embraced the algebraic paradigm of the TI calculator. I can only conclude that the mathematics curricula are prepared by nonmathematicians. Sure, if HP had tried, they too could have assisted/funded textbook writers to prepare better written tomes based on the HP calculators than the ones which are now almost de riguer in high school systems. I would love to hear comments on this.
HP calculators in K12


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