your phone keypad could have looked like this
While 3X3 + 1 wasn’t the most popular in the focus groups, that would be IV-B, it eventually won out. Some of the other designs make sense in as much as they have strong similarity to the dial used on phones previously. I do wonder though, if the prevalent use of the number keypad, in similar forms to the telephone keypad now found on ATMs, safes and my desktop keyboard would look different. Was the 3X3+1 configuration in use in other situations before the telephone company made the switch?telephone
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