The acronym CPU stands for Central Processing Unit, which is the primary component of a computer that performs various computations and executes command instructions. However, many other terms are used interchangeably to describe the CPU, such as processor, microprocessor, chip, CPU chip, and brain of the computer. It is single-handedly responsible for controlling the networking, data storage, and running of all programs on the computer. The terms synonymous with CPU may vary depending on the technicality of the context, but all of them point to the vital role of the CPU in a computer's smooth and efficient operation.