Transcription: The heart of the computer is inside the system unit and is called the central processing unit or CPU. This is a silicon chip which controls the other parts of the computer and performs all the computer's calculations. In order to work, the CPU needs two sets of instructions. Firstly, it needs the operating system which tells the CPU how to start up, how to operate the disk drives and how to run your software. Secondly, the CPU needs a piece of software or an application program to enable it to perform a specific function. Applications are stored on the computer's hard disk or on floppy disk. W ...
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