_______ is the use of two or more CPUs (processors) within a single Computer system.

- Multiprocessing, in computing, a mode of operation in which two or more processors in a computer simultaneously process two or more different portions of the same program (set of instructions).
- Multiprocessing is typically carried out by two or more microprocessors, each of which is in effect a central processing unit (CPU) on a single tiny chip.
- Supercomputers typically combine millions of such microprocessors to interpret and execute instructions.

Source: Britannica