Perfect Computer Notes

Computer can be used in education in the following ways:  Computers In Teaching and Learning Process ( Computer Aided Learning - CAL ) Computers are being used actively in educational institutes to improve the learning process. Teachers can use audio video aids through computer to prepare lesson plans. They can use Microsoft Power Point to prepare electronic presentations about their lectures. These electronic presentations will be displayed on multimedia projectors in class rooms. This will be interesting and easy to learn for students. Multimedia presentations are easy to deliver for teachers too, These presentations save a lot of effort and time. Moreover multimedia presentations are interesting to view and hear sound and visual  effects. Computers will be helpful for:                        Instructing the students using PowerPoint slides, Word documents or Web pages and using hyperlinks for better concept clarity.      2.  Helps in improving pronunciation of

Now-a-days, computers are the essential part of any business organization. Computers are used in business companies for performing different tasks like Record Maintaining, Stock management, Pay Roll Systems, Business Correspondence and Business Communication etc,  Computer can be used in business in the following ways: Explain Different Uses of Computers in Business Organizations Employee Record Keeping All business organizations keep record of their employees. Computers are being used extensively to make this task easier and more efficient. For example, computers are being used to keep records of : Uses of computers in business Daily attendance of employees Recording overtime hours of employees Recording Total hours worked of all employees Calculating Pay of employees Printing pay bills and receipts every month   Marketing    Any business organization can use computers for marketing their products. Stock Exchange Many stock exchanges

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

Uses of Computer Today, computer is used in almost every field of life. The use of computer has made different tasks very easy for us. Computer can be used at home in the many different ways. Explain different uses of computers at Home Computer has made a very vital impact on our society. People are using computers for performing different tasks quickly and easily. In fact, computer has made our life more comfortable.   Uses of Computer at Home Computer can be used at home in the following ways: 1.  Home Budget Computer can be used to manage the home budget. What are the Uses of computer at home You can easily calculate your expenses and income with the help of a software like Microsoft Excel. In MS Excel you can prepare a simple worksheet to calculate your daily expenses and income. 2. Computer Games An important use of computer at home is playing games. Different types of games are available. And if you have internet connection, then you can play games online

There are five basic operations of a computer as follows: 1. Inputting It is the process of entering data and instructions into computer system. Input is performed by input devices like keyboard, mouse, scanner, digital camera and microphone etc. 2. Storing It is the process of saving data and instructions to make them available as and when required in future. Data and programs are stored on permanent storage devices, especially on hard disk. Other permanent storage media include CD - Compact Disk, DVD - Digital Video Disk and Zip Disk etc. 3. Processing It is the process of performing arithmetic and logical operations on data to convert them into useful information. Processing is performed by CPU- Central Processing Unit. CPU is also called Processor. It is the brain of computer. 4. Outputting It is the process of producing useful information after processing data, for example, printed reports for user. Output is presented by output devices like monitor, printe

Q. Write a note on Classification of Computers    OR Explain Types of computer on the basis of Size, Shape and Resources. OR How digital computers are classified? Classification of Computers Computers are classified on the basis of size, speed and price as under: •    Microcomputer or Personal Computer •    Mini Computer •    Mainframe Computer •    Super Computer 1. Micro Computers Desktop Model computer Micro computer is also called personal computer. It was introduced in 1970. It contains  input devices, output device, storage device, memory and processor. It is used by one person at a time. Examples of personal computers are PC and Apple Macintosh. The major types of personal computers are desktop computer and portable computer. Desktop Computers These computers can easily fit on a table or desktop, hence the name. These computers come in two models or casings. In Desktop model, the system unit is placed on the desktop or table. Monitor is placed on the system unit

Following are the main basic units or components of the computer : 1. Input Unit 2. Output Unit 3. Central Processing Unit( CPU / Processor) 4. Memory Unit 5. Storage Unit Diagram Showing Main Components or Basic Units of a Computer Different Basic Units or fundamental components of a computer Brief Description of Basic components of Computer 1. Input Unit Input unit consists of input devices . Input devices are used to enter data and instructions into computer memory. Examples of input devices are Keyboard, mouse, joystick and microphone etc. 2. Output Unit Output unit consists of output devices . Output devices are used to show results produced by computer after data processing. Examples of output devices are Monitor, Printer, plotter and  speaker etc. 3. Central Processing Unit Central processing unit is also called CPU or Processor . It is the brain of the computer. It performs data processing. It controls overall operations and