Which of the following is not part of the central processing unit of a computer?

The central processing unit (CPU) is the "brain" of a computer, responsible for executing instructions and performing calculations. It is made up of several components, including the arithmetic and logical unit (ALU), memory unit, input unit, and control unit. The input unit is responsible for receiving data and instructions from external sources, such as a keyboard or mouse. The memory unit stores data and instructions temporarily for processing, and the ALU performs arithmetic and logical operations on that data. The control unit directs the flow of data and instructions through the CPU. Therefore, the option that is not part of the CPU is the input unit since it is responsible for receiving data from external sources and not part of the internal components of the CPU.