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What is the full form of CPU?

CPU: Central Processing Unit

CPU full form

The full form of CPU is “Central Processing Unit“. CPU is also called as processor, central processor, main processor or microprocessor. CPU is also known as the brain of the computer. The central processing unit (CPU), is the unit that performs most of the processing inside a computer. To control the flow of instructions and data to and from other parts of the computer, the CPU relies heavily on a chipset, which is a group of microchips located on the motherboard.

Traditionally the term CPU refers to a processor consisting of a control unit and an arithmetic logic unit.

Central Processing Unit (CPU) = Arithmetical Logical Unit (ALU) + Control Unit (CU)

Components of CPU

The CPU is broadly divided into three main parts.

CPU architecture

Arithmetical Logical Unit (ALU)

It is a significant part of the CPU. It is responsible for the supervision of all numerical and logical functions, such as subtraction, addition, division, multiplication etc.

Control Unit (CU)

CU is the main component of the CPU. It directs a task to the whole system, and it regulates all the computer activities that occur.

Memory or Register

A register is a particular type of device for memory. The memory stores the information which the processor has to process or already processed.


Some important events related to CPU history are as follows:

1823Baron Jons Jackob Berzelius discovered silicon (Si), which is the processor today
1903Nikola Tesla patents electrical logic circuits (gates or switches).
1947John Bardeen, Walter Brattain and William Shockley invented the first transistor at Bell Laboratories.
1958Robert Noyce and Jack Kilby developed the first integrated circuit.
1971Intel introduced the first microprocessor, the Intel 4004.
1991AMD introduced the AM386 microprocessor family.
1993Intel released the Pentium processor. The processor was a 60 MHz processor, contains 3.1 million transistors and sells for $878.00.
2000Intel released the Celeron 533MHz with a 66MHz bus processor.
2006Intel released the Core 2 Duo processor E6320 (4 M cache, 1.86 GHz, 1066 MHz FSB).
2008Intel introduced the first Core i7 desktop processors (i7-920, the i7-940, and the i7-965 Extreme Edition).
2010Intel launched the first Core i5 mobile processors (i5-430M and i5-520E).
2017Intel released the first Core i9 desktop processor, the i9-7900X, in June 2017. It uses the LGA 2066 socket, runs at 3.3 GHz, has 10 cores, and 13.75 MB of L3 cache.
2018Intel introduced the first Core i9 mobile processor, the i9-8950HK. It uses the BGA 1440 socket, runs at 2.9 GHz, has six cores, and features 12 MB L3 cache.

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