Here's why I want XP instead of windows 7s calculator
I can, with a single click of the mouse and no menu navigation or keyboard commands, switch from decimal to hexadecimal. Doing so instantly converts my former decimal value to hexadecimal and back again if I move back to DEC format. Scientific format does it fine without needing some pointless,to me, programmers version.
It is a minor thing, true, but when I work with my hex editor and just need quick conversions, I don't need the fancy stuff.
I grabbed a copy of XP calc from a friend for this attachment. Much more effective even without the "history" that doesn't work very well anyway.