Just a random thought, but why is order of numbers on my keyboard's numpad
789
456
123
0 .
And the order of my phone keypad
*0#
Why aren't those in the same order?
Lots of theories exist. One such site with some answers is :-
www.vcalc.net/Keyboard.htm
The most common theory I have heard is that calculators keypads already existed with 789 on the top row. They existed way before telephone keypads, so they were never going to change.
Whereas, when telephone keypads were being invented, they also had a second auxiliary use as a form of representing letters (e.g. 2=ABC, 3=DEF etc.). It was thought that if they put the ABC, DEF on the bottom row, it would not make sense.