What does the CPU primarily do in a computer?

The central processing unit (CPU) is often referred to as the brain of the computer because it performs most of the data processing tasks. This involves executing instructions from programs, performing calculations, and managing data flow in and out of memory. The CPU interprets and processes the instructions from software applications, running complex algorithms necessary for the functionality of various programs.

While other components like input/output devices and power supplies play essential roles in a computer’s operation, they do not handle the core processing tasks that the CPU is specifically designed for. The CPU's ability to quickly process data and execute commands is critical for the overall performance and efficiency of the computer system.