Classification of Computer Depending upon Size

Super Computers:-

1. Super computers are most powerful computers of the world.
2. Super computers are most fastest computers of the world.
3. Super computers are most expensive computers of the world.
4. Super computers are very large in size.
5. Super computers have very large amount of Main Memory and Storage.
6. Super Computers use many processors to process data.
7. Some super computers are task specific as they do only one task with extreme concentration.
8. Super Computers are Multi-user computers as more then one user can use them at a time.
9. Super Computers are mostly used in research laboratories, Institutes and space stations.
10. JAGUAR (Oak Ridge National Laboratory), NEBULAE (China), ROADRUNNER (Los Alamos National Laboratory), KRAKEN (National Institute for Computational Sciences), JUGENE (Juelich Supercomputing Center, Germany), PLEIADES (NASA Ames Research Center) and TIANHE-1 (China) are examples of Modern super computers.

Mainframe Computers

The IBM Dictionary Of Computing defines "mainframe" as "a large computer, in particular one to which other computers can be connected so that they can share facilities the mainframe provides (for example, a System/370 computing system to which personal computers are attached so that they can upload and download programs and data). The term usually refers to hardware only, namely, main storage, execution circuitry and peripheral units."

1. Mainframe computers are also very powerful computers
2. Speed of main frames is also good enough
3. These are also expensive computers
4. These computers have large main memory and storage.
5. These are multi-user computers.
6. These computers are mostly used in medium scale research organizations, Banks, industries and governments.
7. IBM Z-series and IBM 360 Series are examples of Mainframe computers.

Minicomputers:-

1. Minicomputers were designed to cut-off the huge price of Mainframe and supercomputers.
2. These computer are enough powerful to work as servers in networks.
3. These computers are also enough speed to support multi tasking
4. These computers are usually found in small organizations and educational institutes
5. These computers are used as servers as well as for minor scale research.
6. Web Servers and E-mail clients are also mostly installed on minicomputers.
7. Small scale industries also use minicomputers to integrate their offices
8. These computers have large memory and storage.
9. Data General, Prime, Adage, Computer Automation, Four Phase, General Automation and Interdata are some examples of minicomputers

Microcomputers:-

1. Microcomputers are very small in size.
2. Microcomputers are very cheap computers.
3. These computers are so small and cheap that everyone can buy them. Hence these computers are called Personal Computers or PCs.
4. These computers have enough speed to support a user to perform work.
5. These computers come with enough main memory and storage capacity
6. These computers are single user.
7. These computers are multi tasking.
8. These computer are simple to use even children under 5 year age can use them.
9. These computers are general purpose computers it means that you can do what ever you want.
10. HP DC series, Intel Desktop series, IBM Think-pad series are examples of Microcomputers