Numeric keypad - definition

A standard telephone keypad comprising of the numbers from 0 to 9 and including the signs "*" and "#".

Alphanumeric keypads are a move up to those and are utilized to enter text as well as numbers. They incorporate letters in order characters - normally a few letters are relegated to every one of the numeric keys - and you can flip their contribution by squeezing the relating key a few times, frequently alluded to as "multi-tap" input.