Input/output hardware

2. a device or arrangement for observing, detecting, or recording the operation of a machine or system, especially an automatic control system. Trackball
4. a small mobile manual device that controls movement of the cursor and functions on a computer.
5. a keypad for an electronic device that consists of a flat surface divided into several differently marked areas which are touched to choose options
7. a camera that records images as digital data
8. an instrument that graphs computer output
10. a kind of ink-jet printer.
11. a control for any of various devices (as a computer) that resembles an airplane's joystick especially in being capable of motion in two or more directions
13. an electroacoustic device, that is connected as a component in an audio system, its function being to make speech or music.
15. a pen-shaped device for direct interaction with a computer through a cathode-ray tube display.

1. a display screen on which the user selects options by touching the screen.
3. electronic or electromechanical equipment connected to a computer and used to transfer data out of the computer in the form of text, images, sounds, or other media.
6. an electronic device for reading printed barcodes
9. a ball that is mounted in a computer console which is partially exposed to be rotated to control the movement of a cursor
12. a device that scans an image (as a photograph) or document especially for use or storage on a computer
14. an assemblage of systematically arranged keys by which a machine or device is operated