The above left image is the equations Y = sin(X) and Y = 0.2X2 graphed simultaniously, on the HP-48GX emulator running on my Windoze 98 box.
I still have my HP-48GX that I used throughout college - and loved the living snot out of. Wish I'd had it to use in high school, it would have graphed just about anything the math teacher could have thrown at me. Plus, you can get free downloads of Tetris and Lemmings for the thing! I never even scratched its symbolic manipulation/equation solver abilities, either.
I just gave this bad boy a permanant spot on the desktop of my Win98 box. I have a feeling I'm going to use this a hell of a lot more than WinDoze calc.exe. It's a great emulator, and since HP made the ROM for the 48GX free (beer), you don't have to own a 48GX or an overly expensive serial link cable to use this on your desktop. r0xx0r.