What does CPU stand for?

The term "CPU" stands for "Central Processing Unit." This component is crucial in a computer system as it acts as the brain of the computer, responsible for executing instructions and processing data. The CPU performs all the fundamental tasks that allow the operating system and applications to run, making it indispensable in computing devices.

The 'central' aspect emphasizes that this unit is the primary component overseeing operations within the computing environment. It orchestrates the activities of all other hardware components, managing data flow between the memory, storage, and input/output peripherals. Understanding the role of the CPU is vital for grasping how computers function and how tasks are executed.

The other options either misrepresent the terminology or suggest non-existent components within computer architecture.