What Is Computer? Computer Characteristics and Types Detailed Guide

Hello friends.. in this post. Today we have going to learn that, what is computer? What are the characteristics of an computer and What are the Types of Computer based on Principles of their oprations and according to it's Classification.

On above topics.. we are going to discuss deeply. So, please keep attension and Read carefully.

What Is Computer

1.Computer is an electronic device, which take input from the user in the form of data or instructions it will be process it and produces desired output for the user.

2. A Computer is an electronic device to which processes raw-data to give meaningful information.

Characteristics of computer

•  Speed

Speed is important characteristics of computer. A computer is capable of processing millions of instructions per second.The speed of computer is measured in MHZ(Mega Hertz ),GHZ(Giga Hertz).

• Memory

Memory is nothing but storage unit of computer. Computers can store a large amount of data which can be speedily accessed whenever required. Data like characters,numbers, graphical images etc. Can be stored.

• Versatility

computers are very versatile machines I.e.they can be used perform a variety of tasks ranging from very simple to very complex. They can be used to perform calculations ,type letters ,play music and movies,play games ,communicate with other computers across the world etc.

• Diligence

This is the ability of computer to perform repetitive tasks with the same accuracy consistently without tiredness.Unlike humans,a computer does not get tired,lack of concentration.or show signs of fatigue.

• Accuracy

The results produce by a  computer are very accurate .Errors, if any ,are produced due to faulty data or a wrong set of instructions. Thus,if a wrong input is given ,the output will be wrong.

• Reliability

Computers consistently produced accurate results and hence are very reliable.

Types Of Computers According To Principles Of Operation

According to principles of operation there are Three types of computer. Which are as follows -

• Analog Computer's

Analog computer are earliest computers .analog computer give approximate results only.They measure in real time parameters  such as, pressure ,temperature , voltage.this are more flexible ,they are generally less precise than digital computers. The examples of analog computer are Deltar,kerrison predictor ,antikythera mechanism.

Analog computer is faster inexpensive .analog computers technology is same as digital computers technology.

• Digital Computers

Digital computers represent all information in using  binary digits(0&1). Digital  computers are use in our  homes and offices. Using digital circuits this computers are designed there are two levels input or output signal. this levels is logic 0 and logic1s.Digital computers give accurate results and faster results. This computers  suited for solving complex problems in technology and engineering.It can store large amount of data and instructions. Digital computers greater flexible.

• Hybrid computers

Hybrid computers are combination of analog and digital computer.It is used automatic operations of complicated machines and physical processes.Hybrid computers used military.defence organisations all the countries and some research labs

Types of computer according to classification

• Micro computers

Micro computers commonly used .They can be further classified as desktop, tablet PC and handheld computers.

   Desktop computers are small enough to fit on top of desk(table)yet are too big to carry around .Desktop are two types -personal computers (PC) and workstations.

PC's are used for personal or official use.it can used for running applications like processors ,spreadsheets etc.These are easier to use of affordable.

  Workstations are expensive and powerful machines mainly used by scientist,engineers etc.to perform complex tasks.

  Notebook computers are also called as laptop computers .These type of computers are portable ,light weight and fit into most brief cases.

   Tablet PC is a type of notebook computer that accept your handwriting .This input is digitized and concerted to standard text that can be further processed by programs such as word processor.

   Handheld computer are the smallest and are designed to fit into the palm of one hand .so it is also called as palm computers these systems typically combine pen input. Writing recognition, personal organization tool and communications capabilities in a very small package.

   There is one another type of micro computer  and that is Personal Digital assistance (PDA).These are most widely used handheld computer.

• Mini Computer

Mini computers are special purpose computers with a very powerful processor.These type of computers are widely used in large manufacturing organizations for distributed data processing.They are expensive and with a large  data storage capacity.

Minicomputers are also known as midrange computers .this are refrigerator sized machines. Large company's production departments use minicomputers to monitor certain manufacturing processes and assembly line operations.

• Mainframe computers

These type of computers occupy specially wired ,air- conditioned rooms .These are nearly powerful as super computers It has capable of great processing speeds and data storage.Insurance companies use mainframes to process information about millions and policyholders.

• Super computers

These are the most powerful computers which have the capabilities of processing many programs concurrently. These computers consist of thousand of integrated  microprocessors .They are used in research applications ,defence, space applications etc.

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