The three components of a CPU are:
1. Arithmetic Logic Unit (ALU)
The ALU is the part of a CPU that performs all arithmetic computations including addition, subtraction, multiplication, and division.
2. Control Unit
The CPUs control unit is responsible for executing or storing the results coming out of the ALU. Within the CPU, the control unit performs the functions of fetch, decode, execute, and store.
3. Registers
Registers work under the direction of the control unit to accept, hold and transfer instructions or data and perform arithmetic or logical comparisons at a high rate of speed.