computer intro


Definition of Computer

“A Computer is programmed device with a set of instructions to perform specific tasks and generate results at a very high speed.”


“A Computer is an electronic machine that can solve different problems, process data, store & retrieve data and perform calculations faster and efficiently than humans”.

Computer Classification : (By Size & Power)

Computers differ based on their data processing abilities. They are classified according to purpose, data handling and functionality.

According to functionality, computers are classified as:

• Analog Computer:

A computer that represents numbers by some continuously variable physical quantity, whose variations mimic the properties of some system being modeled.

• Personal computer:

A personal computer is a computer small and low cost. The term "personal computer" is used to describe desktop computers (desktops).

• Workstation:

A terminal or desktop computer in a network. In this context, workstation is just a generic term for a user's machine (client machine) in contrast to a "server" or "mainframe."

• Minicomputer:

A minicomputer isn't very mini. At least, not in the way most of us think of mini. You know how big your personal computer is and its related family.

• Mainframe:

It refers to the kind of large computer that runs an entire corporation.

• Supercomputer:

Itis the biggest, fastest, and most expensive computers on earth.

• Microcomputer:

Your personal computer is a microcomputer.


Uses of Computers

Uses Of Computers in marketing :

Use of computer with the internet is creating new ways to do the product and services marketing online. Digital marketing services, products, websites, and businesses are growing. Businesses can use a computer to type marketing content, to publish content marketing article on websites and social media. They can sell and market their product on portals or such as Amazon. Businesses can use PPC to get quick ROI for their marketing budget.

Uses Of Computers in government offices :

The government works or official works take more time to complete in the past. There was lots of staff required in the past to manage citizen’s works. But today citizens, consumers are getting a solution with high speed and accuracy. Because of the uses of computer in official works. There are so many applications that speed the process and quality of official works. Such as Microsoft Office package, email, video conferencing tools etc. are few applications that speed the work of government offices with accuracy.

Computer used by various people around the world for different reasons and purposes

  • Kids: – Kids use the computer in their daily life to play games, to use drawing tools and to watch funny (cartoon) videos.
  • High school students: – Schools students can use a computer to learn Hindi English Typing. Students can learn and use digital communication tools. They can learn online safety and etiquette.
  • College students: – Use of computer with the internet for college students is really important. Information Technology education helps them in their study no matter which kind of degree they are doing.
  • Computer Professional & IT people: – The real truth is that there are no other uses of anything other than the computer in the daily life of IT people.


Components of computer system

Computer Architectures

Input Unit

This unit contains devices with the help of which we enter data into the computer. This unit creates a link between the user and the computer. The input devices translate the information into a form understandable by the computer.

CPU (Central Processing Unit)

CPU is considered as the brain of the computer. CPU performs all types of data processing operations. It stores data, intermediate results, and instructions (program). It controls the operation of all parts of the computer.

CPU itself has the following three components −

  • ALU (Arithmetic Logic Unit)
  • Memory Unit
  • Control Unit

Output Unit

The output unit consists of devices with the help of which we get the information from the computer. This unit is a link between the computer and the users. Output devices translate the computer's output into a form understandable by the users.