By contrast, a student or teacher buying for a classroom may want more affordable options and solar power to save on battery expense

Cost: Working pros care less about cost and more about getting the job done.

When buying an HP scientific calculator, consider whether you’re a technical professional, student, or a high school teacher, then check out the following details: (later name for National Semiconductor brand): 650, 3500 Sliderule, 4510 Mathematician, 4515 Mathematician PR, 4520 Scientist, 4525 Scientist PR, 6035 Statistician PR.There are a few different reasons to buy a scientific calculator, which means different people will need different specs. Thanks to Robert Bennett, Frank Boehm, Thomas Brockmeier, Rolf Brueckmann, Don Davis, Larry Gilbert, Kenton Green, Dave Hicks, Dave May, Joe Rigdon, Ken Sumrall, and Erik Peter van Dam for their inputs to date.ĭisposable or Rechargeable Battery Powered ModelsĬommodore (USA): MM6X (just the 'X' version, not all)Įlektronika (Russia): b3-19, b3-21, b3-34, mk-54, mk-61 RPN Calcs - Version 2 (the version on this page will be changed as new information becomes available - but we will not date it) It's fine for sums of products - like most business forms.' HP's first RPN models had 3īy the way, this 'old' style is still in production on many business-oriented printing models. The size of the stack doesn't make a machine RPN or not. This style predates RPN by several hundred years and it's really stretching to call the two number registers a 'two-level stack' because these machines supply no stack operations whatsoever.Īdding machine logic machines switch to infix notation when multiplying and dividing whereas RPN machines remain postfix. The HP-10 was HP's only adding machine logicĬalculator. 'I call such machines 'adding machine logic' machines. Note: Here's a response to the question above from David Hicks, web-meister of the HP Museum. They can just be ignored, but maybe there is a calc out there that fits somewhere between these classifications?'Īny comments or help from our readers? Simple four-function LED calc that functions this way. I believe they function identically to the rpn style, except they have no enter key and only what we would call a two-level 'stack'. 'One complication with classifying rpn/non-rpn is where the old 'arithmetic' style fits-the ones with '+/=' and Only in the last few years have they added a non-RPN machine to the lineup.)īy the way, here's a question for you brought up by one of our contributors: (We omit HPs only because we know virtually all of their models used RPN. Please also let us know the method of power (battery, rechargeable batteries, or AC/line voltage only.) A clue would be an 'enter' key on the keypad instead of a '='.

We invite you to contact us with the manufacturer and model # of any non-HP calculator in your collection that uses RPN. '12' 'enter' '3' '+' and the answer of '15' would appear on the display. '12' '+' '3' and then hit the '=' key for the answer of '15' To add two numbers for instance, you would key in: Packard was termed algebraic (arithmetic?) notation. For those unaware of the difference, the standard for 99% of electronic calculators other than Hewlett

This is a list of calculators from the late 1960s and 1970s which used Reverse Polish Notation (RPN) for their calculation.

H p rpn scientific calculator