How does a Computer Work?

A computer performs mathematical and non-mathematical operations with the help of instructions to process the data to achieve desired results. Input unit of the computer accepts data from the user which is processed by the CPU inside the computer. Output unit displays the results to the user after processing is done. The storage unit stores temporary and final results. A computer provides various features for performing different types of applications ranging from complex calculations in the field of frontline research, engineering simulations, education, printing books and recreational games.

A computer system comprises of the following components - input unit, CPU, output unit and storage unit. The Central Processing Unit acts as the brain of computer. It controls the overall functioning of the system. Motherboard is considered the backbone of the computer. It serves to connect all the parts of a computer together. Control Unit (CU) controls and coordinates among the other components of CPU. It sends data and instructions received from input devices to the memory. It also transfers the processed data from memory to the output unit. Memory is a part of computer where data and instructions are stored temporarily. It can be classified into two broad categories: primary memory and secondary memory. Primary memory is the main memory (internal memory) as the data stored in it can be directly accessed by the CPU. Secondary Memory allows permanent storage of data and instructions.

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