Bottom 
Table 2-8  Bottom components and their descriptions
Component Description
Vent Enables airow to cool internal components.
NOTE: The computer fan starts up automatically to cool internal components and prevent overheating. 
It is normal for the internal fan to cycle on and o during routine operation.
Rear
Table 
2-9  Rear components and their descriptions
Component Description
Vent Enables airow to cool internal components.
NOTE: The computer fan starts up automatically to cool internal components and prevent overheating. 
It is normal for the internal fan to cycle on and o during routine operation.
12 Chapter 2   Getting to know your computer