A CPU, or Central Processing Unit, is a silicon chip with millions of transistors etched on it.
A CPU is a silicon chip which has millions of transistors etched on it in the form of a circuit.
A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions. The fundamental operation of most CPUs, regardless of the physical form they take, is to execute a sequence of stored instructions that is called a program. The instructions to be executed are kept in some kind of computer memory. Nearly all CPUs follow the fetch, decode and execute steps in their operation, which are collectively known as the instruction cycle.
With inputs from Wikipedia.
( Source : deccan chronicle )
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