tower case: front view

Tower case: rectangular enclosure that is taller than it is wide; it houses the operating components and peripherals of a personal computer.

earphone jack

Slot that takes the plug from the earphones.

power button

Button for turning the device on or off.

floppy disk drive

Device used to read or record data on a diskette.

volume control

CD/DVD-ROM drive

Playback device using a laser beam to read the data recorded on a compact disc (CD) or digital versatile disc (DVD).

CD/DVD-ROM eject button

Button used to open the CD/DVD-ROM drive to retrieve the inserted disc.

bay filler panel

Standard-sized panel covering an unused compartment through which electronic hardware can be added.

floppy disk eject button

Button used to retrieve a disk inserted into the floppy disk drive.

reset button

Button used to reboot the computer in the event the system freezes.