When we talk about processor, it's maybe make some computer users confuse, but if we say CPU(central processing unit), they will be known immediately what it is.The processor or CPU are the same which is contained on a single chip called the microprocessor. The microprocessor is the “brains” of the computer system. It has two basic components: the control unit and the arithmetic-logic unit.
- Control unit: The control unit tells the rest of the computer system how to carry out a program’s instructions. It directs the movement of electronic signals between memory, which temporarily holds data, instructions, and processed information, and the arithmetic-logic unit. It also directs these control signals between the CPU and input and output devices.
- Arithmetic-logic unit: The arithmetic-logic unit, usually called the ALU, performs two types of operations: arithmetic and logical. Arithmetic operations are, as you might expect, the fundamental math operations: addition(+), subtraction(-), multiplication(*), and division(/). Logical operations consist of comparisons. That is, two pieces of data are compared to see whether one is equal to ( = ), less than (<), or greater than (>) the other.
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