Computers classification based on size

Computers classification based on size

Modern computers can be classified into the following four types according to their size:

I. Micro Computer: 

They are small in size and less costly. They are used at homes, in schools. A micro computer consists of a single CPU. They have comparatively less memory and working speed. A single person can work on it at a given time. They are also called personal computers. They are of the following types:

Desktop Computer: 

  • They are operated by placing them on the desk or table.
  • These are slightly larger in size. It contains CPU, Monitor, Keyboard etc.

Laptop Computer: 

  • This computer looks like briefcase. It is smaller in size A person can operate it by nlaring it in his lap. They are portable and can be very easily shifted form one place to another. These includes CPU, Monitor, Keyboard, Mouse. Battary is use to provided the power.

Palmtop Computer: 

  • These are smaller in size of Laptop Computer They can be operated on palm. These are light in weight and smaller in size. Battery is used to provide the power. The working capacity of this computer is lesser than laptop.

Note Book Computer: 

  • Notebook computer are similar to laptop computer It can be operated on legs. These are cassily movable from one place to another In these computers CPU. Keyboard. Mouse are tied together The working capacity of these are lesser than laptop computer.

Tablet Computer: 

  • These are bigger than mobile and operated by fingers.

II. Minicomputer

  • They are of medium size They are more powerful, faster and more expensive than Micro Computers. They have more processing power and storage capability They have more then one CPU More then one person can work upon them at a given time They are generally used in big offices, banks etc.

Mainframe Computer

  • They are very large in size. They have greater processing power and memory as compared to minicomputers. Multiple user works at a time on these computer. They are expensive. They are generally used in railway reservations, insurance companies, research institutes and professional organizations. IBM 4300, IBM4381, UAX 8842 ctc are examples of mainframe computers.

IV. Super Computer

  • Super computers are the largest in size. They are the most powerful in processing and memory They process complex calculations with high accuracy They are most expensive They cost millions of rupees. They can support many users at a time They are mainly used in scientific research centers, weather forecasting, space research laboratones, defence centers, controlling nuclear poner plants, genetic engineering etc.
  • PARAM, CRAY, X-MP, NEC, CDC ctc. are examples of super computers.


  • This super computer has been developed in Pune, India, by C-DAC (Centre for Development of Advanced Computing). This is a completely Indian computer. Its manufacturing is a major scientific achievement of India. Many improved and better versions of PARAM like PARAM 1000, PARAM ANANT and PARAM PADAM have been developed. These computers are being used not only in India but also abroad. They are gaining popularity there. They have unique working capacity.
  • The story of the development of PARAM is interesting. In 1980 America banned the supply of technology in the particular field and the supply of computer hardware and CRAY X-MP super computer But it proved as a blessing in disguise. The Indian scientists took it as a challenge and the result was development of PARAM super computer, a computer with matchless features and unique capacity.
  • PARAM is a multipurpose super computer It is used at a large scale in weather forecasting. medicine, designing, making muclear models, distant communication, health care ete Its use is also remarkable in space and nuclear program and for removing the different snags. Finding out oil and gas reservous in different parts of the country is also its achievement. The development of PARAM is the testimony of the capability, talent, Sincerity and dedication of the scientists of India.

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