back in the 80s I paid $200 (real money back then) for a 41CV (or was it a CX?) for solving simultaneous equations in circuits class. Is the Inspire RPN also?
I don’t think it is but I can’t figure it out. Back in the 60s I was pretty good at math. Always scored in the 99th percentile on math. Also in college. Now I can’t even figure out how to use a complex calculator. Will probably just give it to my Grandson tho he is not that good at math.
Back in 1973 I bought a calculator for I think $67. It was made by Rockwell but was branded Sears. I came across it a year or so ago and guess what? It still works. It has a beautiful light green display which is easy on the eyes.
Around 1990 a store cleared out a bunch of HP calculators for $10 each. I bought every one of them just to play with. They all use RPN and for some reason they began to be highly desired around 2000. I sold them all on ebay for between $60 and $100 each. I recall one was purchased by a Scottish Engineering student.
As a senior physics II student in high school in 1974, my physics prof came in with the FIRST digital calculator available in any San Antonio high school. Maybe the firsdt in the city as well.
In fall 1976, after two years of using a slide rule for engineering classes, I scraped up 435.00 dollars (in pre-Carter inflationary dollars!) for an HP45 to use as a junior and senior. RPN.