A dead key refers to a nonfunctioning key on a typewriter, computer keyboard, or word processor. This could occur due to design or disrepair, serving to print a character for placing a grammatical mark or statistical symbol over or under another character without moving the cursor or carriage.
A numeric keypad is a specific set of keys on a computer keyboard, located beside the main alphabetic keypad, primarily featuring digits 0 to 9 and a decimal point key, arranged similarly to an adding machine for efficient numerical input.
