Calculator

[phidailo]

I had a hp48gx passed down to me but never really liked it. I sure do love my TI-89 though

[BrianG]

Well, that may be because the HP uses RPN entry along with a stack. I know that once you get used to it, you never go back. But that may be the geek in me. :)

By the way, my web calculator thingy has a page for a few of the common unit conversions.