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What Is RPN? Why Did/Does HP Use RPN? Learning RPN (1999)

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Re: What Is RPN? Why Did/Does HP Use RPN? Learning RPN (1999)

#13
I was forced to use an HP12C as part of my university degree. Once you get used to RPN it’s quite uncomfortable to switch back. It’s a much more intuitive way to do math once you get over the small hurdle. 15 years later and I’m still using the same calculator!

Re: What Is RPN? Why Did/Does HP Use RPN? Learning RPN (1999)

#14

I was forced to use an HP12C as part of my university degree. Once you get used to RPN it’s quite uncomfortable to switch back. It’s a much more intuitive way to do math once you get over the small hurdle. 15 years later and I’m still using the same calculator!

Yep, had my Radio Shack calculator stolen from a college lab in 1990. Replaced it with a 32sii. After 30 years of RPN, I can never use a normal calculator. They are horrible.

Re: What Is RPN? Why Did/Does HP Use RPN? Learning RPN (1999)

#15

I was forced to use an HP12C as part of my university degree. Once you get used to RPN it’s quite uncomfortable to switch back. It’s a much more intuitive way to do math once you get over the small hurdle. 15 years later and I’m still using the same calculator!

We had plug-and-chug competitions at school: big equations with some inputs, ready, go. The HP RPN folks would always beat the algebraic (casio, TI, etc) ones.

Re: What Is RPN? Why Did/Does HP Use RPN? Learning RPN (1999)

#16

I like to repeat everywhere that HP48 series had code block syntax with arrow notation. a a + >> (double function) Those machines were well before their time.. I hope the makers had fun, it's really sad it's gone from the market although one could say that ES6 in your smartphone browser is your modern day HP48 reincarnation.

My grandfather was a civil engineer and he had a number of different RPN HP calculators. He gave them to me when I was becoming interested in programming - a really exciting gift to explore.

Do you still have them? Back in the 90’s when HP was discontinuing them, I bought 4x 32sii. I still have them un-opened. I still have my dads LED one from the 70’s. They are collectors items now.

Re: What Is RPN? Why Did/Does HP Use RPN? Learning RPN (1999)

#17
post #8

It took awhile to learn RPN in undergrad in electrical engineering. But, once you learn it, it is so much easier to solve problems and it is much more efficient. You never go back, and you are less likely to make errors entering in equations compared to your peers. This is important on timed exams. I prefer to always use RPN. MacOS has an RPN mode on their calculator, which one can activate by pressing command + R. O…

yep, rpn is great!

And since you're solving part by part, it's easier to spot mistakes in calculations.

Going back to algebraic is pretty much impossible... luckily, there are many rpn calculator apps for phones.

Re: What Is RPN? Why Did/Does HP Use RPN? Learning RPN (1999)

#18
post #8

It took awhile to learn RPN in undergrad in electrical engineering. But, once you learn it, it is so much easier to solve problems and it is much more efficient. You never go back, and you are less likely to make errors entering in equations compared to your peers. This is important on timed exams. I prefer to always use RPN. MacOS has an RPN mode on their calculator, which one can activate by pressing command + R. O…

Emacs calc-mode is RPN by default as well.

Re: What Is RPN? Why Did/Does HP Use RPN? Learning RPN (1999)

#19
Reading these comments, I'm surprised that people think in RPN. (I mean I shouldn't be, I just didn't think of it)

I wonder if teaching it early on, instead of parenthesis, would have made math lessons different?

Could there have been different notations used for things like factoring out a quadratic equation?

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