Originally Posted by
h2oxtc
Now THATS a real calculator (RPN)! I don't recognize the model though. I'm assuming it's an HP, of which I've had many over the years. Sadly, recent models have not been made nearly to the same quality as those through the 80's.
Here's an image of my first.
Browsing I stumbled on your post, Brings back memories of him bringing a box of the first ones for us to play with before they were put on sale. Four function, square root and memory as I recall. We loved them. But, unfortunately RPN, never really caught on and technology rapidly advanced plus more and more students were barely functionaly literate. So, they went away to niche uses.