Exploring the beauty of retro electronics (Gallery)

[Carsen]

(02-23-2018 02:13 AM)Eddie W. Shore Wrote:  Here's what I don't understand: why doesn't HP have a basic more "entry level" RPN (possibly both RPN/algebraic) calculator, like an updated HP 25S or even an (solar-powered) HP 21?

I think it's because nobody (age 30 and below) really knows that RPN exists. Not even my professors (if they are young) know what it is. Once, one of my classmates picked up my dad's 15C in physics class to perform a calculation and he shouted...

"Ahhhh, I'm sorry I broke your calculator. It doesn't work!"

Plus, when I try to explain RPN to fellow classmates, they immediately think it's too hard and loses interest. I haven't got one person to stay interested for more than 5 minutes.