The crossword solution for the term CPU PART is UNIT. A CPU (Central Processing UNIT) is the main component of a computer system, responsible for executing instructions and performing calculations. It is also known as the processor or microprocessor. The CPU is composed of several parts, including the UNIT, which is the part that performs the actual processing. The UNIT is made up of transistors, logic gates, and other components that allow it to carry out its tasks.