buses, high-speed internal connections that are used to send control signals and data between the processor and other components., control unit (CU), fetches, decodes and executes instructions and also, moves data around the system., registers, small amounts of high-speed memory contained within the CPU., clock, contained within the CPU and used to coordinate all of the computer's components., cache, small amount of high-speed random access memory (RAM) built directly within the processor., arithmetic logic unit (ALU), performs calculations and makes logical decisions

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