Same here. I knew about RPN before Calc, and knew there were calculators that used it, but it seemed bizarre to me. Once I started using Emacs, I decided to see

Same here. I knew about RPN before Calc, and knew there were calculators that used it, but it seemed bizarre to me. Once I started using Emacs, I decided to see what Calc was all about, and finally realized how slick it feels. It's really cool to need to do some math while coding or writing, hit a quick keybind, and have a full-fledged calculator right in my editor. And the cool part is you can do things algebraically, too. Even solve for variables. Really crazy program.