Final answer:
The printer is not an input device for a computer; it is an output device used to produce hard copies of digital data.
Step-by-step explanation:
The input device for a computer that is not listed among the options is c. printer. Input devices are peripherals used to provide data and control signals to a computer. Options a. bar code technology, b. keyboard, and d. touch screen applications are all input devices because they are used to enter data into a computer. Bar code technology captures information from bar codes and inputs it into a system, keyboards are used for typing instructions or information, and touch screen applications recognize touch input to control or input data. However, printers are output devices, designed to produce a hard copy of digital data from a computer.