Why are the numbers on a calculator sorted descending and on a phone dail pad sorted ascending? [duplicate]

Question

Possible Duplicate:
Why do numpads on keyboards and phones have reversed layouts?

If you look at the layout of a calculator the numbers are always sorted like this:

Most phone dail pads the numbers are sorted starting with 1

Does anyone know why?

Answer 1

Used Google, this is what I found: http://www.vcalc.net/Keyboard.htm