The hard disk drive is the built-in mass storage device for the computer.
2
Insert a straightened paper clip into the reset switch hole to reset the system in the event that your computer locks up or "hangs."
3
The battery-pack latch releases the battery pack.
4
The battery-pack lock locks and unlocks the battery pack. You must slide the battery pack to the unlocked position before you can slide the battery-pack latch to release the battery pack.