3 IntroductionAn Input Devices is a piece of hardware that is used to enter data into a computer or content into a computer system.There are two types of input, they are :Manual Input DevicesAutomatic Input DevicesAn Output Devices is a piece of hardware that obeys a computer command to do something that is real.
4 Input Devices BACK Examples of Input Devices: Keyboard Tracker ball MouseJoystickTouch screenScannerDigital camerasGraphics TabletMicrophoneBACK
5 KeyboardKeyboard is the most common and widely usedfor input devices.It is made up of buttons called 'keys'. The keysare arranged into sections, for example :Alphabet keysCommand keys (insert, delete, home, end, page up/down)
6 BACK Mouse Mouse is the most common and widely used for input devices. A mouse has two buttons, a right and left one and also acentral wheel which allows you to scroll up and down the page.The left one have different function to the right one, the left clickingusually lets you to choose a menu item and the right clicking brings to themenu to select the task.Tracker ballTracker ball are particularly easy for who like tolimited their movement in their hands.JoystickJoystick is popular for the gamers, who wants to bea controllers in the games.BACK
7 Digital CameraA digital camera takes pictures and can usually recordvideo too.The pictures it takes and the videos recorder are beenstored in files.MicrophoneA microphone can be used to input sound.ScannersScanners can be used to copy the images or texton paper into a digital format that can be used by the computer.There are two type of scanners are :Flatbed ScannersHandheld Scanners
8 Graphics TabletGraphics tablets are often used by graphicsdesigners .Graphics tablets can be use for drawing becauseit’s made more accurate than drawingby mouse.Touch screenTouch screens are not common used to inputa large amounts of data.Touch screens are easy to use and this oftenbeen found in public places, such as banks.Touch screen is a device which works for bothdevices of input and output .
9 BACK Examples of Automatic Input Devices: Magnetic Ink Character Recognition (M.I.C.R)Optical Character Recognition (O.C.R)Optical Mark Reader (O.M.R)Magnetic Stripe ReadersBarcode ReadersBACK
10 Magnetic Ink Character Recognition (M.I.C.R) Magnetic Ink Character Recognition are oftenuse in bank to check the cheque number.This will been provides a high level of the security.The M.I.C.R will only recognize numbers printed ina standard font by using the magnetic ink for checking.Optical Character Recognition (O.C.R)An O.C.R system is a normal scanner with some special software.When the scanner scan piece of paper into the computer and when it’s finish the O.C.R software then examines the page and changes the letters into a form that can be edited or processed by a normal word processing package.
11 BACK Optical Mark Reader (O.M.R) Optical Mark Reader interprets the patternof marks then sends the results to the computerfor analysis and reporting.Magnetic Stripe ReadersMagnetic strips are usually found at the back ofmost credit cards.The Magnetic Strip Reader can read personal detailsabout the card number such as account number and name.Barcode ReadersA Barcode Reader is an automatic input device whichis use to scan or read the barcode.The barcode doesn’t contain the price of the item.BACK
12 Output Devices BACK Examples of Output Devices : Monitors Printers Laser PrintersInk-Jet PrintersDot-Matrix PrintersPlottersSpeakersBACK
13 MonitorA monitor (or screen) is the most commonuse for output devices.The picture on a monitor is made up of thousandsof tiny colored dots called pixels.The higher the number of pixels, the better qualityof the output.PrintersPrinters are another common output devices.Most of the printers produce their output onpaper but that doesn’t mean that the printer can dothere printing only on the paper.
14 BACK Laser Printers Laser printers are used in many workplaces because they can print a large number of sheetsvery quickly and they produce high qualitydocuments.Laser printers are quite expensive too becausethere produce a high quality of output and quiet fast.Ink-Jet PrintersInk-jet printer are cheap and this are common use at home.The color that it’s been printer out doesn’t need to be perfect.Dot-Matrix PrintersDot-Matrix are the first type of printers thathad been used at homes and schools but nowas the technology goes on they are not usedmuch nowadays.Dot-matrix printer are noisy and low quality.BACK
15 BACK Plotters Plotters are a type of printer which is able to draw a high quality images on a very largepieces of paper. The paper were about 3 footwide and 10 foot long.The people who want to buy or use this plotters need to knowhow to use it as well.Plotter are been used by the engineers, architects and map- makers to draw plans of buildings, diagrams of machines or large scale mapsSpeakersSpeakers usually produce a much higher qualityof sound than the internal speaker.BACK