Various Types of Computer

Computer Dynasty (Type of computers) :

Computers are generally classified into three types :

1. Digital Computers :

In Digital Computers, mathematical expressions are finally represented as binary digits (0 and 1) and all operations are done using these digits at very high rate. The Digital Computer basically knows only how to add. Remaining operations like multiplication, division and exponential etc., are first converted into "addition" and then calculated.

2. Analog Computers :

Analog is a Greek word which means establishing similarities between two quantities. In Analog Computer similarities are established in the form of current or Voltage Signal. Analog Computers operate by measuring rather than by counting. An example for Analog Computer is that of controlling a flight simulator for training pilots.

3. Hybrid Computers :

Hybrid Computers combine all the good qualities of both the Analog and Digital Computers. In such a Computer some calculations are done in Analog portion of Computer and some are done on Digital portion of the same Computer. Then it utilises the services of the devices which convert Analog Signal into Digital and digital signal to Analog wherever necessary. Such units are called Modem.

Classification of Computers :

1. Personal Computer :

A single-user-oriented and general-purpose micro-computer processing system that can execute program instructions to perform a wide variety of tasks.

2. Micro Computers :

The smallest category of computer, consisting of a microprocessor and associated storage and input/output elements.

3. Mini Computers :

A relatively fast but small and inexpensive computer with somewhat limited input/output capabilities.

4. Main Frame Computers :

A large computer system that has the capability to support many powerful peripheral devices.

5. Super Computers :

A computer system that is characterized by its very large size and very high processing speeds and generally used for complex scientific applications.