3.1+Hardware+-+The+CPU

=3.1 hardware -The CPU= "The central processing unit (CPU) is the portion of a [|computer] system that carries out the instructions of a [|computer program], and is the primary element carrying out the computer's functions." - Wikipedia The central processing unit is known as the brain of a computer, it is divided into two main parts - the ALU and the Control unit:
 * 1) **The Control Unit** -- controls the fetching of instructions from the main memory and the subsequent execution of these instructions. Among other tasks carried out are the control of input and output devices and the passing of data to the Arithmetic/Logical Unit for computation.
 * 2) **The Arithmetic/Logical Unit (ALU)** -- carries out arithmetic operations on integer (whole number) and real (with a decimal point) operands. It can also perform simple logical tests for equality and greater than and less than between operands.

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