Computer 11 Notes for Computer Notes

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On The Basis Of Working Principle

Types of computers on the basis of working principle:

  1. Analog Computer
  2. Digital Computer
  3. Hybrid Computer

Comparison Table

Analog Computer Digital Computer Hybrid Computer
Analog computer operates on continuous data like temperature, pressure, speed, voltage, etc. Digital computer operates on discontinuous or discrete data (0 and 1). Hybrid computer is the combination of analog and digital computer. It can operate on both continuous and discontinuous data.
It operates by measuring and comparing. It operates by counting and calculation. It can convert analog data to digital and vice versa.
It has low accuracy. It has higher accuracy. In a hybrid computer, analog component is used for measuring and comparing, and digital component is used for controlling.
It usually contains either no any or limited storage capacity. It usually contains larger storage capacity. Its storage capacity varies from the application area.
It is special purpose computer. It is a general purpose computer. It is a special purpose computer.
It cannot be reprogrammed. It can be reprogrammed.
It can be operated only by skilled manpower. It can be operated by general users. It can be operated only by skilled manpower.
Devices like thermometer, speedometer, pressure gauge, voltmeter, etc. are the examples of analog devices. Devices like digital watch, digital speedometer, etc. are the examples of digital devices.
‘Presley’ is an example of analog computer. IBM desktop PC, Dell laptop, Acer notebook are the examples of digital computers. Super computers are usually hybrid computer.

The wave form of analog computer is

analog computer

  • The wave form of digital computer is

Digital computer

Major application areas of hybrid computers are:

  • Weather forecasting
  • Automated industry control
  • Automated vehicles
  • Rocket launching system
  • Diagnosis in hospital

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