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Register:

A register is a small high-speed memory inside CPU. The CPU contains a number of registers. Registers are used to store information being processed. These are temporary storage areas for instructions or data. The temporary results during processing are also stored in registers. Each register has a predefined function. Control unit manages registers for the following purposes:
  • Input the instructions or data
  • Store the instruction or data
  • Transfer the instructions or data
  • Perform arithmetic or logical operations at high speed.

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