Computer notes Chapter 1.

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Presentation transcript:

Computer notes Chapter 1

Hardware Central processing unit Input unit Communication Output unit Main Memory Backing storage unit

Backing storage Main Memory The most popular from of modern computer system. It is storage data temporarily. Floppy disk CD-ROM Hard disk

Output unit Visual display unit It is output device that resembles a television. It is output device for sound. Printer is output device that prints the output on paper.Some printer can print colour.

Input unit Keyboard is most common input device.Data and programs are entered by pressing keys. Mouse is input device that rolls on flat surface.

Software Applications software is end-user software that we use for everyday work. System software While an application program is run on computer, a ‘background’ program is required to make sure that the computer hardware carries out the intended tasks.

Types of computer system Computer are classified into four types depending on physical size and processing speed and memory size.The four types are microcomputer,minicomputer, mainframe and supercomputer.

Microcomputer are most familiar kind of computer.They also know personal computer(PC). Minicomputer are used to link up number of workstation in a company. Mainframe are room size system capable of high speed processing of large amount of data for many users at the same time. Supercomputer are high speed special purpose computer system.These system are built to process large amount of mathematical and scientific data.

THE END.

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