Discovering Computers 2008 Fundamentals Fourth Edition Chapter 5 Input and Output

Chapter 5 Objectives List the characteristics of a keyboard Summarize how these pointing devices work: mouse, trackball, touchpad, pointing stick, light pen, touch screen, stylus, digital pen, and gaming and media player controllers Describe other types of input, including voice input; input devices for PDAs, smart phones, and Tablet PCs; digital cameras; video input; scanners and reading devices; terminals; and biometric input Describe the characteristics of LCD monitors, LCD screens, and CRT monitors Summarize the various types of printers Explain the characteristics of speakers, headphones, and earphones; fax machines and fax modems, multifunction peripherals, and data projectors Identify input and output options for physically challenged users Next

What Is Input What is input? p. 166 Fig. 5-1 Next  Input device is any hardware component that allows users to enter data and instructions  Data or instructions entered into the memory of computer

Keyboard and Pointing Devices What is a keyboard? p. 168 Fig. 5-2 Next  Input device that contains keys users press to enter data into a computer  Includes typing area, numeric keypad, and function keys  Can be cordless or built-in

Keyboard and Pointing Devices What is a mouse? p. 169 Fig. 5-3a Next  Pointing device that fits under the palm of your hand  Pointing device controls movement of pointer  Mechanical mouse has rubber or metal ball on its underside Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Mouse below Chapter 5

Keyboard and Pointing Devices What is an optical mouse? p. 169 Fig. 5-3b Next  No moving mechanical parts inside  Senses light to detect mouse’s movement  More precise than mechanical mouse  More expensive than a mechanical mouse

Keyboard and Pointing Devices What is a trackball? p. 170 Fig. 5-4 Next  Stationary pointing device with a ball on its top or side  To move pointer, rotate ball with thumb, fingers, or palm of hand

Keyboard and Pointing Devices What are a touchpad and a pointing stick? p. 170 Figs. 5-5—5-6 Next  Touchpad is small, flat, rectangular pointing device sensitive to pressure and motion  Pointing stick is pointing device shaped like pencil eraser positioned between keys on keyboard

Keyboard and Pointing Devices What is a light pen? p. 170 Next  Handheld input device that can detect the presence of light  Press light pen against screen surface and then press button on pen

Keyboard and Pointing Devices What is a touch screen? p. 171 Fig. 5-7 Next  Touch areas of screen with finger  Often used with kiosks

Keyboard and Pointing Devices What is a digital pen? p. 171 Fig. 5-8 Next  Looks like a ballpoint pen, but uses pressure to write text and draw lines  Used with graphics tablets, flat electronic boards

Gaming and Media Player Controllers What are the types of game controllers? p. 172 Fig Next  Gamepad  Joystick  Wheel  Light gun  Dance pad  Motion-sensing game controller Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Wii Remote below Chapter 5

Gaming and Media Player Controllers What is a touch-sensitive pad? p. 172 Fig Next  Input device on a portable media player that enables users to scroll through and play music, view pictures, watch videos or movies, adjust volume, and customize settings  Click Wheel

Other Types of Input What is voice input?  Entering input by speaking into a microphone  Voice recognition or speech recognition is the computer’s capability to distinguish spoken words p. 173 Next Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Voice Input below Chapter 5

Other Types of Input p. 173 Fig Next What is audio input?  Entering sounds into a computer - speech, music, and sound effects  MIDI - standard defining how digital musical devices represent sound electronically

Other Types of Input How is data entered into a PDA? p. 174 Fig Next

Other Types of Input What is a smart phone? p. 175 Fig Next  Users can input and send text messages, graphics, pictures, video clips, and sound files

Other Types of Input What is a Tablet PC? p. 175 Fig Next  Mobile computer  Primary input device is a pressure-sensitive digital pen

Other Types of Input What is a digital camera? p. 175 Fig Next  Allows you to take digital pictures  Images viewable immediately on camera  Download to computer  Post pictures to Web

Other Types of Input What is resolution? p. 176 Next  Number of horizontal and vertical pixels in a display device  Resolutions range from 3 million to more than 16 million pixels (MP)  Pixel (picture element) is smallest element in electronic image  Greater the number of pixels, the better the image quality

Other Types of Input What is video input? p. 176 Next  Process of capturing full-motion images and storing them on a computer’s storage medium  Digital video (DV) camera records video as digital signals

Other Types of Input What is a PC video camera and a Web cam? p. 176 Fig Next  PC video camera c — c DV camera used to capture video and still images, and to make video telephone calls on Internet  Also called PC camera  Web cam c — c video camera that displays its output on a Web page Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Web Cams below Chapter 5

Other Types of Input What is video conferencing? p. 176 Fig Next  Two or more geographically separated people who use a network or the Internet to transmit audio and video data

Video Input Video: A Digital Whiteboard to Make Presentations Roar Next CLICK TO START

Other Types of Input What is a scanner? p. 177 Fig Next  Light-sensing device that reads printed text and graphics  Used for image processing, converting paper documents into electronic images

Other Types of Input What is a turnaround document? p. 177 Fig Next  Document that you return to the company that sent it  Portion you return has information printed in OCR characters

Other Types of Input What is an optical reader? p Fig Next  Optical character recognition (OCR) reads typewritten characters  Optical mark recognition (OMR) reads hand-drawn pencil marks, such as small circles  Bar code reader  Device that uses light source to read characters, marks, and codes and then converts them into digital data

Other Types of Input What is an RFID reader? p. 178 Fig Next  Reads information on the tag via radio waves  Can be handheld devices or mounted in a stationary object

Other Types of Input What is a magnetic stripe card reader? p. 179 Fig Next  Reads the magnetic stripe on the back of a credit card  Exposure to a magnetic field can erase the contents of a card’s magnetic stripe

What is a magnetic-ink character recognition (MICR) reader? Other Types of Input p. 179 Fig Next  Can read text printed with magnetized ink  Banking industry almost exclusively uses MICR for check processing

Other Types of Input What is a point of sale (POS) terminal? p. 180 Fig Next  Records purchases, processes credit or debit cards, and updates inventory

Other Types of Input What is an automated teller machine (ATM)? p. 180 Fig Next  Self-service banking machine that connects to a host computer through a network

Other Types of Input What is biometrics? p. 181 Fig Next  Authenticates person’s identity by verifying a personal characteristic  Fingerprint scanner captures curves and indentations of a fingerprint Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Biometric Input below Chapter 5

Other Types of Input What are examples of biometric technology? p. 181 Fig Next  Voice verification system compares live speech with stored voice pattern  Signature verification system recognizes shape of signature  Iris recognition system reads patterns in blood vessels in back of eye  Biometric data is sometimes stored on smart card, which stores personal data on microprocessor embedded in card

What is Output What is output? p. 182 Fig Next  Data that has been processed into a useful form  Output device is any hardware component that can convey information to one or more people

Display Devices What is a display device? p Fig Next  Output device that visually conveys text, graphics, and video information  Typically used with desktop computers  Monitor houses display device as separate peripheral

Display Devices What is an LCD monitor? p. 184 Fig Next  Uses liquid crystal display  Have a small footprint  Mobile devices that contain LCD displays include  Notebook computer, Tablet PC, ultra personal computer, portable media player, smart phone, and PDA Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click LCD Technology below Chapter 5

Display Devices Video: SID: Size Matters Next CLICK TO START

Display Devices What is a plasma monitor? p. 185 Fig Next  Uses gas plasma technology  Larger screen size and richer colors than LCD, but are more expensive

Display Devices What is a CRT monitor? p. 186 Fig Next  Contains cathode-ray tube (CRT)  Common sizes are 15, 17, 19, 21, and 22 inches  Viewable size is diagonal measurement of actual viewing area

Display Devices What determines the quality of a CRT monitor? p. 186  Screen resolution  Refresh rate is speed at which monitor redraws images on screen  Text created with a smaller dot pitch is easier to read Next

Printers What is a printer? p. 187 Fig Next  Output device that produces text and graphics on a physical medium  Purchasing a printer

Printers What are the various ways to print documents and pictures? p. 188 Fig Next Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Printing Digital Camera Images below Chapter 5

Printers What is a nonimpact printer? p. 189 Fig Next  Forms characters and graphics without striking paper  Ink-jet printer sprays tiny drops of liquid ink onto paper  Prints in black-and-white or color on a variety of paper types Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Ink-Jet Printers below Chapter 5

Printers What is a photo printer? p. 190 Fig Next  Color printer that produces photo-lab-quality pictures  Many photo printers have a built- in card slot  PictBridge is a standard technology that allows you to print pictures directly from a digital camera

Printers What is a laser printer? p Fig Next  High-speed, high-quality nonimpact printer  Prints text and graphics in high-quality resolution, ranging from 1,200 to 2,400 dpi  Typically costs more than ink-jet printer, but is much faster Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Laser Printers below Chapter 5

Printers What is a thermal printer? p. 191 Fig Next  Generates images by pushing electrically heated pins against heat-sensitive paper  Dye-sublimation printer, (also called a digital photo printer) uses heat to transfer dye to specially coated paper

Printers What is a mobile printer? p. 192 Fig Next  Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, PDA, or smart phone while traveling

Printers What is a plotter? p. 192 Fig Next  Sophisticated printer used to produce high-quality drawings  Large-format printer creates photo-realistic-quality color prints

Printers What is an impact printer? p Fig Next  Forms characters by striking mechanism against inked ribbon that contacts paper  Dot-matrix printer produces printed images when tiny wire pins strike ribbon  Line printer prints entire line at a time

Other Output Devices What is an audio output device? p Fig Next  Computer component that produces music, speech, or other sounds  Speakers, earphones, and earbuds are common devices Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Earphones below Chapter 5

Other Output Devices What is voice output? p. 194 Next  Computer talks to you through speakers on computer  Internet telephony allows you to have conversation over the Internet

Other Output Devices What is a facsimile (fax) machine? p. 194 Fig Next  Device that transmits and receives documents over telephone lines What is a fax modem?  Modem that allows you to send and receive electronic documents as faxes

Other Output Devices What is a multifunction peripheral? p. 194 Fig Next  Provides functionality of a printer, scanner, copy machine, and fax machine

Other Output Devices What is a data projector? p. 195 Fig Next  Device that takes the text and image from computer screen and projects it onto larger screen

Putting It All Together What are suggested input and output devices for the home user? p. 196 Fig Next Home User Input Device Output Device Enhanced keyboard or ergonomic keyboard Mouse Stylus for PDA or smart phone Game controller Color scanner 4-megapixel digital camera Headphones that include a microphone PC video camera 17- or 19-inch color LCD monitor Ink-jet color printer; or Photo printer Speakers Headphones or earphones

Putting It All Together What are suggested input and output devices for the small office/home office user? p. 196 Fig Next SOHO User Input Device Output Device Enhanced keyboard or ergonomic keyboard Mouse Stylus and portable keyboard for PDA or smart phone, or digital pen for Tablet PC Color scanner 3-megapixel digital camera Headphones that include a microphone PC video camera 19- or 21-inch LCD monitor Color LCD screen on Tablet PC, PDA,or smart phone Multifunction peripheral; or Ink-jet color printer; or Laser printer (black-and- white or color) Fax machine Speakers

Putting It All Together What are suggested input and output devices for the mobile user? p. 196 Fig Next Mobile User Input Device Output Device Wireless mouse for notebook computer Touchpad or pointing stick on notebook computer Stylus and portable keyboard for PDA or smart phone, or digital pen for Tablet PC 4-megapixel digital camera Headphones that include a microphone Fingerprint scanner for notebook computer 17-inch LCD screen on notebook computer LCD screen on PDA or smart phone Mobile color printer Ink-jet color printer; or Laser printer, for in- office use (black-and- white or color) Photo printer Fax modem Headphones or earphones Data projector

Putting It All Together What are suggested input and output devices for the power user? p. 196 Fig Next Power User Input Device Output Device Enhanced keyboard or ergonomic keyboard Mouse Stylus and portable keyboard for PDA or smart phone Pen for graphics tablet Color scanner 6- to 12-megapixel digital camera Headphones that include a microphone PC video camera 23-inch LCD monitor Laser printer (black-and- white or color) Plotter or large-format printer; or Photo printer; or Dye-sublimation printer Fax machine or fax modem Speakers Headphones or earphones

Putting It All Together What are suggested input and output devices for the large business user? p. 196 Fig Next Large Business User Input Device Output Device Enhanced keyboard or ergonomic keyboard Mouse Stylus and portable keyboard for PDA or smart phone, or digital pen for Tablet PC Touch screen Light pen Color scanner 6- to 12- megapixel digital camera OCR/OMR readers, bar code readers, or MICR reader Microphone Video camera for video conferences Fingerprint scanner or other biometric device 19- or 21-inch LCD monitor LCD screen on Tablet PC, PDA, or smart phone High-speed laser printer Laser printer, color Line printer (for large reports from a mainframe) Fax machine or fax modem Speakers Headphones or earphones Data projector

Input and Output Devices for Physically Challenged Users What input devices are available for those with physical limitations? p. 197 Fig Next  Keyboards with larger keys  Head-mounted pointer controls pointer on screen

Input and Output Devices for Physically Challenged Users What other output options are available for visually impaired users? p. 197 Fig Next  Change Window settings, such as increasing size or changing color of text to make words easier to read  Blind users can work with voice output  Braille printer outputs information in Braille onto paper

Processing and organizing input into output Summary of Input and Output Data and instructions Various techniques of input Commonly used input devices Various methods of output Commonly used output devices Chapter 5 Complete