Explain The Concept of A Computer System

A system is a set of inter related components that work together to fulfill a purpose. For example a Road Transportation System will consist of the parts - roads, vehicles- trucks, buses, vans, cars etc, passengers, the staff for ticketing and maintenance of vehicles and roads etc. And the transportation system will fulfill the purpose of carrying of passengers and luggage from place to place. Similarly, a computer system consists of many components that work together to fulfill the purpose of data processing. A Computer system consists of the following four parts:

1.    Hardware
2.    Software
3.    Data
4.    User

1.    Hardware
The mechanical devices that makeup the computer are called HARDWARE, for example, Keyboard, hard disk, monitor, processor and mother board etc. Hardware are physical devices. They can be touched. Hardware device are interconnected and perform input, processing and output operations.

2.    Software
Software is the set of instructions given to computer to perform a task. Software tells the computer what to do. System Software like operating systems are used to manage components and operations of computer. Application Software like MS Word and MS Excel are used to solve specific problems of the user, for example creating documents or preparing Student Result Sheet etc. Thousands of different software are available for use on PC.
3.    Data
Data is the collection of raw facts. Data processing is the primary job of a computer. Computer processes data in many ways to convert them into useful information. Processed data becomes information. For example, during census, data of all citizens is collected. Census data is used to get report/information about total population of a country and literacy rate etc.
4.    Users
People that operate the computer are called computer operators or computer users. Users use computer to solve different problems. For example, in a college a computer operator in Examination Section will feed marks obtained by students in a software like MS Excel. He/ She will perform certain functions and formulae to calculate percentage and grade of each student and prepare a result sheet. This result sheet will show the marks obtained, percentage, grade and Fail/ Pass status of every student.
Further Suggested Reading:

Introduction To Computer
1.1 What is Computer
1.2 What are Characteristics of Computer
1.3 What are the basic units or components of a computer
1.4 What are Different Types of Computer
1.5 Write a note on Classification of Computers
1.6 What are the basic operations of a computer
1.7 Explain The Concept of A Computer System
1.8 What are uses of computer at Home
1.9 Uses Of Computer in Business Organizations
1.10 Uses Of Computer In Education Field
1.11 Uses Of Computer in Medical Field
1.12 Uses Of Computer In Industry
1.13 Uses Of Computer In Science
1.14 Differentiate between Analog and Digital Computers

Explain Different Types Of Data

DATA Data is the collection of raw facts and figures. It is without any proper meaning. Data may be collection of words, numbers, graphics or sounds. What is data? Explain different types of data Examples of Data 1) Student Data on Admission Forms When students get admission in a college. They fill admission form. This form contains raw facts (data of student) like name, father’s name, address of student etc. 2) Data of Citizens During census, data of all citizens is collected. 3) Survey Data Different companies collect data by survey to know the opinion of people about their product. 4) Students Examination data In examination data about obtained marks of different subjects for all students is collected. Different Types Of Data There are following main types of Data. 1) NUMERIC DATA Numeric data consists of 0 to 9 digits, + and – sign and dec...

What are Dual Devices or Both Input/ Output Devices

The devices that can be used to perform both functions -input and output- are called Dual Devices. These devices are also called Dual Purpose Devices or Both Input/Output Devices. With the help of a dual purpose device, we can enter data into computer as well as we can output data from the computer to outside world. For example, Dual devices include: Touch Screen Monitor, Modem, Network Interface Card, Sound card, Hard disk drive, Floppy disk Drive, Magnetic Tape Drive CD-Writer and DVD-Writer etc. These are also called Input/output devices, because they perform both functions. Touch Screen Monitor Dual Devices or Both Input / Output Devices - Touch screens Touch Screen Monitor is an input/output device. It uses a special touch sensitive screen. The User can enter data by touching icons or menus on the screen. As soon as the user selects a command from menu, output is displayed on screen. Commonly touch screen monitors use sensors to detect touch of finger. ...

Electronic Data Processing In Business

NEED OF ELECTRONIC DATA PROCESSING Today, no business can exist without information . There is no more business without information. To improve the business there is a need to improve data processing and information system. Now it’s the age of competition that involves information technology for faster and accurate data processing . These days computer is playing a main role in every field of life. It is also playing a central role in business . In business, a large amount of data has to be processed daily. It is impossible to process such a large amount of data without a computer. Explain importance / need of electronic data processing in business We know that a computer can process data accurately and quickly. The need of data processing in business is clear. Following are the reasons: 1) RECORD KEEPING An organization cannot exist without records. Record keeping is a difficult and complex problem. Electronic data processing has simplified it. Receiving, storing, pro...

Perfect Computer Notes

Search This Blog