Central Processing Unit (CPU) The core of every computer is the Central ____ Unit. This directs the system to ____ computer programs. In order to do this the computer needs access to: (a) random access memory or ____, where programs are stored (b) ____ memory which is used to store data waiting to be processed. As soon as the computer starts up, the CPU runs an endless fetch-execute cycle, constantly fetching instructions and decoding them. The speed of the CPU is set by a chip which determines the CPUs clock speed, which is measured in ____. Data is moved around the system along a ____ or pathway. A bus simply connects one part of the ____ to another. To improve performance of a computer we can use dual-core processors, which is simply two CPUs working together. Information is stored in the form of a 0 or 1, otherwise known as a bit. 4 bits are called a ____, 8 bits are called a byte. 1000 bytes are called a ____.

CPU Plenary

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