The Calculator Scientific Calculator was an RPN (Reverse Polish Notation) calculator that was popular with engineers back in the and it was manufactured from 1981 through It was a programmable calculator that had built-in support for c
Hewlett-Packard's HP has inspired uncanny loyalty among a generation of financial-industry pros who have grown up with the instrument and its quirky features—such as "reverse Polish notation"—and who relish its snob appeal.
I love my TI89 Titanium, but my 1st scientific was an HP15C. I love the reverse polish notation of the HP's. I found this HP48GX at a flea market in my hometown this week for 25$. Price on Amazon? $150.00 !!!!!