The Central Processing Unit (CPU) is commonly known as "the brain" of the computer. It is a complex electronic circuitry within the computer that is responsible for carrying out the instructions of a computer program. The CPU performs the basic arithmetic, logical, and input/output operations of the computer. It communicates with the other components of the computer, such as the memory and the input/output devices, to execute commands and perform tasks.
The CPU is considered the most important component of a computer system, and its performance is a key factor in determining the overall speed and efficiency of the computer. The CPU is often referred to as the brain of the computer because, like the human brain, it is responsible for processing information and controlling the operations of the computer.