The correct answer is "printer".
An input device is a hardware component used to provide data and control signals to a computer. It allows users to communicate with the computer and input data for processing.
Diskette, card, and keyboard are all input devices. A diskette is a magnetic storage medium used for data storage, a card is a device used to input data through a card reader, and a keyboard is an electronic device used for typing and inputting data into a computer.
A printer, on the other hand, is an output device. It prints out data and information that has already been processed by the computer.