Here, let’s have a look at what is computer?

In simple let’s say the computer is an electronic device that generally deals with information or some data. To be more specific let’s look at the definition of a it.

Definition of computer?

A computer is an electronic device that usually takes input from the user and processes these inputs according to the set of predefined instructions (called program) and gives the output(results) and saves the same for future references.

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Let us see some basic information on computer

Who invented computer?

Many people have contributed to this computing field.

But more of all, Charles Babbage contributed because during the mid-1830s Babbage was the first to developed plans for the analytical engine. Charles Babbage, an English mechanical engineer, and polymath originated the concept of a programmable computer. ‘Father of modern Computer’, Charles Babbage.

Full Form of Computer

There is actually no full form of it. The term computer is not an acronym. Computer word is derived from word compute which means to calculate. But some people say that COMPUTER stands for Common Operating Machine Purposely Used for Technological and Educational Research.

Components of Computer

There are main five components of computer. Those are

  • Input,
  • CPU
  • Output
  • Primary memory and
  • Secondary memory


It refers to any kind of information or data that is given from the user to the system for processing. Input is usually sent from devices such as a keyboard, mouse, etc. It plays a major role in getting the desired output for any operation.


The Central Processing Unit (CPU) is the part of a system. It’s the main processor or just the processor where it executes the instructions of the program that is defined and written as per the user’s code. In simple it’s a portion of a where it retrieves and executes the instructions.

It performs operations like basic arithmetic, logic, controlling, and input and output operations that are specified by the user in the program. CPU consists of an Arithmetic Logic Unit (ALU), a control unit, and various registers that help in executing the instructions.


Data generated by the computer is referred to as an output. The output is data that a computer sends.Itis the act of producing the required result as per the instructions that are mentioned in the code. The output that is sent by the computer can be in any format, it can be text, audio, image, etc.

Primary Memory:

There are two types of primary memory

  • RAM, or Random-Access Memory
  • ROM, or Read-Only Memory

Memory is an important component of computer determining system performance. It provides space for applications to store and access data.

RAM, or Random-Access Memory

RAM is the super-fast and temporary data storage space that a computer can access right now or after few moments.

In addition, It is generally located on the motherboard of a computer and acts as an internal memory of the CPU.

RAM is a volatile memory which means when your system shut down while you are working or if power shutdown then the data will be completely erased. You cannot retrieve the lost data. RAM data can be modified which is an advantage over ROM which doesn’t allow modification of data.

There are two types of RAM

  • DRAM (Dynamic RAM)
  • SRAM (Static RAM)

ROM, or Read Only Memory

The data stored in ROM is permanent no matter what damage occurs while your working on the system.ROM data is permanent which is called non-volatile memory. Changes or deletion of instructions is impossible in ROM.

Two types of ROM

  • PROM (Programmable ROM)
  • EPROM (Erasable Programmable ROM)

Lets not dig deeper into the types of ROM AND RAM.

Secondary Memory

It stores the data permanently. Secondary memory is non-volatile like ROM. Most importantly, the secondary memory data has to be first transferred to the primary memory since the processor cannot directly access the secondary memory.

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6 thoughts on “WHAT IS COMPUTER”

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