PowerPoint Presentation

Input and OutputInput/output and StorageOdane Lindo ID#20141690Computer Science

What will I learnInputKeyboardMouseAudio InputMenuDigital InputOutputMonitorAudio OutputPrinterEvaluation

What You Will Learn AboutInput devices used to get audio and digital data into the computerThe characteristics of a monitors quality and the various types of monitorsThe two major types of printersThe difference between memory and storage

InputInput is any data entered into the computers memory.Types of input include:Data Unorganized information (words, numbers, images, or sounds) that the computer converts to meaningful informationSoftware Programs transferred from storage devices to the computers memoryCommands Instructions that tell the computer what to doResponses Prompts requiring user feedback

Input Devices: Giving Commands

KeyboardMouseOther Pointing Devices

KeyboardThe keyboard allows the computer user to enter words, numbers, punctuation, symbols, and special function commands into the computers memory.

Enhanced / Extended KeyboardErgonomic KeyboardTypes of KeyboardsEnhanced or Extended keyboard Typically 101 keys laid out in the QWERTY fashion; connected to the computer by a cableCordless keyboard Uses infrared or radio wave signalsErgonomic keyboard Designed to help prevent cumulative trauma disorder (CTD) or damage to nerve tissues in the wrist and hand due to repeated motion

The MouseThe mouse is the most widely used pointing device.A mouse is palm sized.As the mouse is moved, its movements are mirrored by the on-screen pointer.

Wheel MouseCordless Mouse

Types of MouseWheel mouse Contains a rotating wheel used to scroll vertically within a text document; connects to PS/2 port or USB portCordless mouse Uses infrared signals to connect to the computers IrDA port; it must be within sight of the receiving port

Using the Mouse Mouse buttons enable the user to initiate actions.Clicking (left-, right-, or double-clicking) allows the user to select an item on the screen or open a program or dialog boxClick and drag Holding down the left mouse button and moving the mouse enables the user to move objects on the screen

JoystickTouch PadTouch ScreenTrackballPointing StickPen

Other Types of Pointing Devices

Audio InputComputers can accept input from a microphone.An expansion card called a sound card records and plays back sound files. Sound files contain digitized sound data.Popular sound file formats include:Windows WAVMoving Pictures Expert Group (MPEG)MP2 and MP3Musical Instrument Digital Interface (MIDI)

Audio Input: Speech RecognitionSpeech recognition is a type of input in which the computer recognizes words spoken into a microphone.Special software and a microphone are required.Latest technology uses continuous speech recognition where the user does not have to pause between words.

Digital CamerasDigital Video

Digital Input: Digital Cameras and Digital Video

Digital CamerasThe images light falls on a charge-coupled device (CCD) which transforms the lights patterns into pixels (individual dots).Images are stored in the camera using flash memory. The most popular types are CompactFlash and Smart Media.Photo-editing programs enable the user to edit the images.

Digital VideoA video capture board transforms analog video into digital video.Digital video cameras use digital technologies to record video images.A Web cam is a low resolution video camera.

Web camDigital video camera

Output Devices: Engaging our SensesOutput devices are peripheral devices that enable us to view or hear the computers processed data.Visual output Text, graphics, and videoAudio output Sounds, music, and synthesized speech

MonitorsA monitor is a peripheral device which displays computer output on a screen.Screen output is referred to as soft copy.Types of monitors:Cathode-ray tube (CRT)Liquid Crystal Display (LCD or flat-panel)

CRTLCD

Cathode-ray tube (CRT)Resemble televisions Use picture tube technologyLess expensive than a LCD monitorTake up more desk space and use more energy than LCD monitors

Liquid Crystal Display (LCD)Cells sandwiched between two transparent layers form imagesUsed for notebook computers, PDAs, cellular phones, and personal computersMore expensive than a CRT monitor Take up less desk space and use less energy than CRT monitorsTypes of LCD monitors: Passive-matrix LCD Active-matrix LCD Gas plasma display Field emission display

PrintersA printer is a peripheral device that produces a physical copy or hard copy of the computers output.

Question 1Question 2Question 3Question 4Question 5Questions

In the tutorial there are a number of inputs, select the type of input that is correctDataSoftwareprocessingnumbers

What kind of device is the mouse? TypingStoringWalkingPointing

Select the type of mouse that is correct?Drawing mouseWalking mouseWheel mouseGround mouse

What does a computer monitor do?OutputInputprocessStore

Name one (1) kind of storage deviceKeyboardMouseHard drivePrinter

Your Correct!!!

Sorry wrong answer!!!

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