cd-rom drive eject button: opens and closes the cd tray.
cd-rom drive activity light: indicates when the cd-rom drive is in use.
diskette drive eject button: releases a diskette from the drive.
diskette drive activity light: indicates when the diskette drive is in use.
hard disk drive activity light: indicates when the hard disk drive is in use.
power-on light: indicates when your computer is turned on.
power control button: enables you to turn the computer on or off manually.