CPU
The CUP (Central Processing Unit) the "brain" of the computer follows the instruction of the software to manipulate data into information. The CPU consists of two parts
i) The Control Unit
ii) The Arithmetic Logic Unit.
The two components are connected by a kind of electric "roadway" called a bus.
THE CONTROL UNIT
The control unit tells the rest of the computer system how to carry out a program instructions. It directs the movement of electronic signals between the main memory and the arithmetic / logic unit. Its also directs these electronic signals between main memory and the input and output devices.
THE ARITHMETIC / LOGIC UNIT
The arithmetic logic unit (ALU) performs arithmetic operations and logic operations and control the speed of those operations. In simple words the arithmetic unit performs the simple mathematical functions like Division, Multiplication, addition and subtraction.
The logical operations are the comparisons between two things e.g. >,<,=or not =. The speed of the CPU is expressed in MHz. The latest CPU, which is available in the market is 2GB manufactured by Intel and AMD (the two largest companies of processors).
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