System unit
The system unit is
the core of a computer system. Usually it's a rectangular box placed on or
underneath your desk. Inside this box are many electronic components that
process information. The most important of these components is the central
processing unit (CPU), or microprocessor, which acts as the "brain"
of your computer. Another component is random access memory (RAM), which temporarily
stores information that the CPU uses while the computer is on. The information
stored in RAM is erased when the computer is turned off.
Almost every other part of your computer
connects to the system unit using cables. The cables plug into specific ports(openings),
typically on the back of the system unit. Hardware that is not part of the
system unit is sometimes called aperipheral device or device.
System unit
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