A user programmable input apparatus with a keyboard comprises several keys with one or more special keys thereof on the keyboard for input operations, a microprocessor to receive inputs from the keys when they are pressed, a nonvolatile memory programmable by operating the keys for users themselves to program or define key definitions or functions for the keyboard or to store data or microinstructions or other programs thereto, and a transmission arrangement connected to the microprocessor to output data to the computer system or other peripheral connected with the input apparatus.