04/ 05/ 03 1 Computer Input and OutputDairne JespersonCharles Darwin University 04/ 05/ 03 2 IntroductionThis presentation aims to: briefly explain what computer input and output isexamine some of the more commonly used input and output devices to help understand these concepts. 04/ 05/ 03 3 Input Input is any data or instruction that is entered into the computers memory.Input devices are the hardware components that you use to enter the data or instructions into the computer. 04/ 05/ 03 4 OutputOutput is a result of: inputting data into the computer the computer processes the data the computer sends out the processed information by means of an output device Output can be displayed: on screen, printed out, in the form of graphics, or voice or sound output. 04/ 05/ 03 5 Devices I nput Devi cesKeyboardMouseScannerJoystickMicrophoneDigital camera Output Devi cesComputer screenSpeakersPrinter These are just a few of the input and output devices you may recognise 04/ 05/ 03 6 KeyboardA particular key is pressed, sending an electronic signal to the computers brain.The computers brain interprets the signal.The computer sends back a particular letter or character which represents the signal that the computer has interpreted. 04/ 05/ 03 7 MouseControls the movement of the cursor on the screen as you move the mouse, the cursor moves in the same direction.Useful in graphics programs where you can draw pictures by using the mouse as a pen or paintbrush.So called because of its shape the wire connecting it to the computer being its tail. 04/ 05/ 03 8 ScannerScans a picture or text.Translates information into a form the computer can understand.This information can then be displayed on the computer screen stored to a file used in computer documents 04/ 05/ 03 9 Computer ScreenThe most obvious and useful output device, displaying text and graphics as you are working on them.Can display still or moving images. 04/ 05/ 03 10 SpeakersSpeakers output sound from your computer.The speakers take the electronic signals stored on things like CDs and DVDs and and send them out as the sound we can hear. 04/ 05/ 03 11 PrinterThis device is used for outputting text or images onto paper.Different kinds of printers produce different quality output.Laser and ink-jet printers produce the highest quality documents. 04/ 05/ 03 12 To SummariseMachines that let you enter data are Machines that show you the data in a form you can understand are