CLASSIFICATION OF COMPUTERS

Classification of Computers not only accepts alphabets and digits as input for processing, but it accepts input in other forms also like signals, Signals. Are continuous flow of physical quantities temperature and speed etc. are some of the examples of signals and the following inputs can be used:

  1. Digits and alphabets
  2. Signals

In the last update, we have discussed “Software and Its parts”. If you didn’t check updates on my site so, please visit the link below:-
https://masterofcomputer.com/software/

Today’s topic is “Classification of Computers”. Before starting of this topic we must know about the last content that is –
– What is Software and types?
– In detail Software type description.
– About Language Processors.

A BLOCK DIAGRAM CLASSIFICATION OF COMPUTER
Fig. 1.9: A BLOCK DIAGRAM CLASSIFICATION OF COMPUTER

COMPUTES BASED ON DATA REPRESENTATION

On the basis of different types of inputs, computers can be classified as:-

1. Digital Computers

2. Analog computers

3. Hybrid Computers

CLASSIFICATION OF COMPUTERS BASIS ON TECHNOLOGY

ANALOG COMPUTERS
Fig. 1.10: ANALOG COMPUTERS

Analog Computer: – Analog is a Greek word that means establishing similarities between two quantities. It measures and answers in HOW MUCH. It represents data not as numbers but as physical analogies. In analog computers, similarities are established as current or voltage signals. Analog computers operate by measuring rather than by counting. In an Analog computer, the variable is an electrical signal produces analogous to the variable of a physical system. Arithmetic operations are performed electronically using small-signal amplifier blocks.

The answer obtained are decoded mathematically or as graphs. Thus by analog computer, it is very easy to get graphical results directly. The speed meter is a food example of analog computation. It receives an input by continuous variable rotational speed of the driveshaft and provides output according to the pointer movement of the dial which in term indicates the speed of a car.

Hence the speed of the car is measured by analogous physical quantity which is the rate of rotation of the main drive shaft. Linear motion is analogically converted into circular motion and measured by counting the member of revolutions. Mathematically speed is a derivative of distance traveled with respect to time i.e. v=ds/dt with a differential equation that can be easily represented by an analog computer. It is very fast but the accuracy is poor. These devices are used in electronic industries, power plants, and chemical plants.

DIGITAL COMPUTERS
Fig. 1.11: DIGITAL COMPUTERS

Digital Computer: – A digital computer counts and answers in HOW MANY. It represents data as numbers and performs mathematical and logical operations on that data. Mathematical expressions in digital computers are eventually represented as binary digits ‘0’ and ‘1’. All operations are performed using these digits at a very high rate. The digital computer basically known only how to add.

The remaining operations such as multiplication, division, and exponent are first combined and converted into ten counts. Just like digital watches which directly counts the seconds and minutes in an hour. Digital processors also count discrete values to achieve desired output results. These computers are used in engineering, mathematics, statistical operations, research, and accounts.

HYBRID COMPUTERS
Fig. 1.12: HYBRID COMPUTERS

Hybrid Computer: – Hybrid computers are the combination of all good qualities of both analog and digital computers. In such computers calculations are performed in some portion of the computer and some are done in the digital portion. Then it utilizes the services of devices that convert analog signals the digital signals and digital signals into analog wherever necessary such devices are called Hybrid Computers and are used in hospitals’ intensive care units. Analog devices may measure a patient’s heart function, temperature, and other vital signs. These measurements are then converted into numbers and supplied to the digital section of the system.

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