People often call Central Processing Unit as the brain of computer system.
The computer brain is a microprocessor called the central processing unit (CPU). The CPU is a chip containing millions of tiny transistors. It's the CPU's job to perform the calculations necessary to make the computer work -- the transistors in the CPU manipulate the data. You can think of a CPU as the decision maker.
The base of operations for the brains of a computer is the motherboard. The computer brain is a microprocessor called the central processing unit (CPU). The CPU is a chip containing millions of tiny transistors.
A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions.