Purpose of a CPU: o process data and carry out instructions., Works in the background., Data and instructions are transported around the CPU through the use of buses., Control Unit: Coordinates the timing of the different components and the flow of data in the CPU, Is responsible for fetching and decoding instructions and managing their execution on the processor, Responsible for the execution of instructions on the processor,  Controls and monitors the hardware attached to the computer, Tells the ALU, memory and hardware hot to respond to instructions, Communicates with the rest of the components by using the control bus, Arithmetic and Logic Unit : where the CPU performs the arithmetic and logic operations., Data is passed to the ALU to allow the required calculations to be carried out., The results of any calculations are then sent to be stored in a register., The arithmetic part, which deals with calculations, e.g. 1 + 2 = 3, The logic part, which deals with any logical comparisons, such as the comparison of two numbers, e.g. 2 > 1, includes a register that it uses to store intermediate results of calculations. This register is known as the accumulator. , Immediate Access Store: This is where the CPU holds all the data and programs it is currently using, The IAS is often referred to as the registers, which are a very small amount of storage. In a 64-bit processor, each register will store just 64 bits,

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