The hardware system consists of external and internal physical components that enable a computer to accept input, process the input, store data, and produce outputs. Each of the hardware components will be discussed in more detail in Unit 2. Hardware Systems.
The figures below show some external hardware components of a computer.
Figure 2 Hardware components
The diagram below indicates the hardware components inside the system unit. Each of these components plays an essential role in the operation of a computer system.
Figure 3 Components inside the system unit
Hardware components provide the physical interface to a computer system. However, they cannot function without instructions to operate them. These instructions are software programs.
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