I have an HP/11C, which I bought new in 1985. I have used it on a daily basis for the last 15 years and it's only on its 3ed set of batteries. Its been dropped more times than I can count. It looks a little rough around the edges but it still works like the day I bought it. The RPN makes it very easy to use. I love the look on peoples faces when they ask to borrow it and they can't figure out how it works. And, when I try to explain it to them they just glaze over. Does HP make anything to compare to the HP/11C today?


Never handheld a HP 11C, only a HP 15C, very nice calculator. Of course no calculator can compare to the 10C series, HP just doesn't make like that anymore.

Nowadays there's only one RPN calculator you can buy that comes close, the HP 32SII. It's the only non-graphic scientific RPN calculator and the only scientific RPN calculator that's "pocketable". The 48G-models and the 49G require very large pockets...


Wen I was a student, I first owned a HP 11C that was broken by a pal and bought a 15C with the insurance money.

I remember they were fantastic : the horizontal shape was just great and they had so many functions ! It was easy to store a few programs to save time during the exams.

Now only the 32SII, which is a bit larger, does far more than the 11C and the 15C for less money, but I think I'm attached to these because I used to use them when I was a student...

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