Why are the numbers on phone keypads arranged differently from those on computer keyboards?
On phone keypads, the numbers are arranged:
123
456
789
*0#
On a computer keyboard or calculator, they are arranged
789
456
123
0.
Why the difference?
On phone keypads, the numbers are arranged:
123
456
789
*0#
On a computer keyboard or calculator, they are arranged
789
456
123
0.
Why the difference?
spacemissing
Different ideas by different designers.
Personal preferences.
Who knows?
Typewriter keyboards were originally made
with the letters in all sorts of different layouts.
Some had the alphabet in its normal order.
The "QWERTY" arrangement became sufficiently popular to become standardized,
even though it makes very little sense from a logical point of view.
Telephones need the * and # buttons for certain functions,
so they had to be put somewhere.
>> Some touchtone keypads have a fourth column,
with either A, B, C, and D or FO, F, I, and P on the buttons.
See the Wikipedia article "Dual-tone multi-frequency signaling".
Anonymous
I don't know exactly why, but it seems that if you use any device thats a dedicated calculator, the numbers are on the bottom. I have a calculator with the paper that prints out and the numbers are on the bottom. I've seen accountants use the paper calculators and can add pages of numbers and never look at the display.