The PC (Personal Computer) consists of a central unit, referred to as the computer has various components (a part which combines with other parts to form something bigger such as the motherboard, CPU, RAM). The computer is a box which contains most of the working electronics connected with cables to the components. There is easy way to think about the computer. If one thinks a computer as a human body, the components will be the parts of the human body such as a heart, a brain, a lung, a stomach. If one does not have any one of them, one may have a ring on one's head and knock on death's door. The computer is the same as a body structure; therefore, the computer will not work correctly, if one of components is not work.
             There are many components in the computer; however, the silvery small square box, the CPU, is certainly the most important PC component. Without the CPU, there would be no PC on the earth. The CPU has hundreds of needles at the bottom; moreover, the size is the same as a biscuit that can be taken in a bite. The CPU stands for Central (the center of PC data processing) Processing (the processing, moves and calculates, data) Unit (a chip, which contains millions of transistors). One can think of the CPU as the brain of a human body (Central). The CPU can calculate the money (Processing), and it operates with a thousands and one voltages roll (Unit).
             The smallest and the cleverest brain can calculate the total amount of a hundred and one coins. However, if the brain does not have the memory that it calculated, the work will come to nothing; therefore, the brain needs to memorize what it calculated. A greenish 10 cm ruler, RAM does this job. You can understand RAM (Random Access Memory) as the working memory storage. All the data, which the PC uses and works with during operation, are stored here.
             Finally, the brain can do memorize thousands of coins; however, it will forget the am
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