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Types Of Digital Computer

 Types Of Digital Computer

  1. Micro Computer 
  2. Mini Computer 
  3. Mainframe 
  4. Super Computer

Micro Computer

Micro Computer can be classified into:
  • Desktop PCs
  • Sits on desks, Rarely moved, Large and Bulky
  • Memory capacity, Graphics capacity and software availability vary from one computer of another used both for business and home applications.


Portable PCs

  • Can be moved easily from place to place
  • Weight may varies
  • Small PCs are popular known as laptop
  • Widely used by students, scientist, reporters etc.

Advantages

  • Small Size
  • Low Cost
  • Portability
  • Low Computing Power
  • Commonly used for personal application

Disadvantages

Low Processing Speed

Mini Computer

  • Medium Sized Computer
  • Also called the minis For example. IBM36, HP9000 etc.
  • Computing power lies between microcomputer and mainframe computer.

Terminals


Mini Computer Characteristics

  • Bigger size than PCs
  • Expensive than PCs
  • Multiuser
  • Difficult to use
  • More computing power than PCs
  • Used by medium sized business organizations, colleges, libraries and banks.

Mainframe Computer

  • Known as enterprise servers
  • Occupies entire room or floors
  • Used for centralizing computing
  • Serve distributed users and small servers in a computing network.
  • Large, fast and expensive computer 
  • Cost millions of dollar 
For example: IBM3091, ICL39 etc.

Characteristics

  • Bigger in size than mini computer
  • Very expensive
  • Support a few hundred user simultaneously ( multi users)
  • Difficult to use
  • More computing power than mini computer
  • Have to be kept in a special air conditioned room 
  • Used in big business organizations and government departments

Super Computer

  • Fastest and Expensive
  • Used by applications for molecular chemistry, nuclear research, weather reports and advanced physics.
  • Consists of several computers that work in parallel as a single system

Advantage

Speed

Disadvantage

Generate a large amount of heat during operation





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