A CPU (Central Processing Unit) is a hardware component of a computer system that is capable of processing input data.

A CPU is consisted of several internal parts (internal architecture) :

  1. Cache
  2. Register
  3. ALU (Arithmetic Logic Unit)
  4. Control unit

Generally there are two CPU types:

  1. CPUs with large number of sophisticated registers
  2. CPUs with large number of built-in and specialized instructions
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