input output devices

Category: Education

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INPUT DEVICES Parts of Computer,which are used to feed data and commands are called Input Devices Some Input Devices are: Keyboard Mouse Joy Stick Scanner Voice Input System

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keyboard Keyboard is the most commonly used Input Device.The keys on trhe keyboard can be classified as follows: Alphabetic keys Numeric keys Function keys Symbols keys Special keys

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Mouse Mouse is a pointing device which is used to draw,move and resize the picture and has a small ball inside,which when rolls,moves the rollers,which move the pointer on the screen of has two buttons on the top

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Joy stick A joystick consists of vertical bar.It can be rotated in various directions.This rotation moves the cursor to the desired position.

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Scanner A Scanner is an input device.It is used to make an exact copy of text or a picture and send them to the computer .

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Voice Input System Voice speech system is capable of converting human speech into a binary or a machine language.

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Output Devices Output devices are the devices which are used to get final result of work done on computer. Following are some Output Devices: Monitor or Visual Display Unit Printers Plotters Speakers

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Monitor Every Computer has a television like device.It is called monitor or visual display unit.It is used to display information to us. We can have two types of monitor: Monochrome Monitor Colour Monitor

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Monochrome Monitor Special display device that displays a single color ( white, green) character set on a contrasting (black) background, producing a sharp, clear display that is easy to read

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Coloured Monitor Coloured Monitors can display upto sixteen millions of colours and shades.

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Printers These days a lot of printers are available in the market which can be categorised as follows: Impact Printers Non-Impact Printers

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Impact Printers In Impact Printers, a print head strikes an inked ribbon placed immediately in front of a sheet of paper,leaving an imprint Off the print head on the paper For e.g.. DOT MATRIX PRINTERS: This printers forms numbers, letters and graphics with the help of rotating forward or backward.

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Non-Impact printers These type of printers are the special printers in which the result or output is produced directly on the paper by using a special technology. For E.g.. LASER PRINTER Laser printers use laser light to produce the required image on the paper.Toner(an ink) is used in Laser Printers to generate output.

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Plotters Plotters are used to obtain a graphic or pictorial presentation of the final result (output).Plotters are used for variety of applications which include drawing graphs, making maps and detailing of houses or cars. Following are two types of plotters: Flat bed plotters Drum Plotters

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Flat Bed Plotters The paper is held horizontally on a flat bed in the Flat bed plotters. The pen is moved across the surface in the A and B direction. In addition,the pen can be raised or lowered onto the paper,during the drawing functions.

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Drum Plotters In these plotters , the pen is mounted on a carriage which moves across the width of the paper only. The paper is mounted around a horizontal drum The drum drives the paper back and forth as the pen moves across the width of the paper.

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Speakers Speakers are used to listen sounds from a computer system.When you are watching a cartoon film, the picture appears on the monitor, but you can hear cartoon character talking only if speakers are attached to your computer

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INPUT DEVICES KEYBOARD MOUSE JOYSTICK SCANNER OUTPUT DEVICES MONITOR PRINTER PLOTTER SPEAKER Mind At Work Classify the following into input and Output devices of a computer Keyboard,monitor,printer,plotter,mouse,joystick,speaker,scanner

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Correct the given jumbled words Umeos mouse Utotpu output Pirrtne printer Nesnrac scanner Rkpesase speakers

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