Which part of a computer system performs operations on data from all applications run by the computer?

The graphics processing unit (GPU) is specialized in handling graphics-related tasks such as rendering images and videos, processing visual data, and running complex graphical applications. While important for graphics-intensive operations, the GPU does not handle operations on data from all applications as the CPU does.

Read-only memory (ROM) is a type of non-volatile memory that stores firmware or system software permanently. It is used for booting up the computer and holding critical system instructions but does not actively process data from applications like the CPU.

Random-access memory (RAM) is volatile memory used for temporarily storing data that the CPU needs to access quickly. It is crucial for running applications and multitasking but is not responsible for performing operations on data from all applications; that task falls to the CPU.