controlunit - It selects and retrieves instructions from the main memory, cache - allows quicker access to info for the CPU (shorter distance travelled)), registers - it can hold an instruction, a storage address, or any kind of data., clock speed - the measurement of cycles your CPU does per second, arithmeticlogicunit - performs simple addition, subtraction, multiplication, division, and logic operations, input - data that is entered into or received by a computer, output - e.g. printed documents, on-screen data and sound,

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