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scanners, joysticks, and microphones.
A CRT Monitor is an older type of monitor that looks like a television
screen.
A Flat Panel LCD Monitor is a newer type of monitor that is thin,
lightweight and somewhat expensive.
The size of a monitor is measured diagonally across the screen.
Average monitor sizes range from 15-inches to 21-inches.

The monitor refresh rate determines how quickly the monitor redraws,
or updates, the image on the screen. Most monitors have a refresh rate
of 72MHz or better.
A screen saver is a moving picture that appears on your computer
screen when you don’t use your computer for a while.
Some computer devices have both input and output functions.

Examples include touch screen monitors, camera, and multifunction
printers.