Which of the following is not a part of the CPU?
Storage unit is not a part of CPU.
Secondary storage (also known as external memory or auxiliary storage), differs from primary storage in that it is not directly accessible by the CPU. The computer usually uses its input/output channels to access secondary storage and transfers the desired data using intermediate area in primary storage.
The Central Processing Unit (CPU) The computer does its primary work in a part of the machine we cannot see, a control center that converts data input to information output. ... The CPU interacts closely with primary storage, or main memory, referring to it for both instructions and data.