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Discovering Computers 2008 Fundamentals Fourth Edition Chapter 5 Input and Output 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 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? Ø Data or instructions entered into the memory What Is Input What is input? Ø Data or instructions entered into the memory of computer Ø Input device is any hardware component that allows users to enter data and instructions p. 166 Fig. 5 -1 Next

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

Keyboard and Pointing Devices What is a mouse? Ø Pointing device that fits under Keyboard and Pointing Devices What is a mouse? Ø Pointing device that fits under the palm of your hand § Ø 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 p. 169 Fig. 5 -3 a Next

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

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

Keyboard and Pointing Devices What are a touchpad and a pointing stick? Ø Ø Keyboard and Pointing Devices What are a touchpad and a pointing stick? Ø Ø 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 p. 170 Figs. 5 -5— 56 Next

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

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

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

Gaming and Media Player Controllers What are the types of game controllers? Ø Ø Gaming and Media Player Controllers What are the types of game controllers? Ø Ø Ø 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 p. 172 Fig. 5 -10 Next

Gaming and Media Player Controllers What is a touch-sensitive pad? Ø Input device on Gaming and Media Player Controllers What is a touch-sensitive pad? Ø 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 Ø Click Wheel p. 172 Fig. 5 -11 Next

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

Other Types of Input What is audio input? Ø Entering sounds into a computer Other Types of Input What is audio input? Ø Entering sounds into a computer - speech, music, and sound effects Ø MIDI - standard defining how digital musical devices represent sound electronically p. 173 Fig. 5 -12 Next

Other Types of Input How is data entered into a PDA? p. 174 Fig. Other Types of Input How is data entered into a PDA? p. 174 Fig. 5 -13 Next

Other Types of Input What is a smart phone? Ø Users can input and Other Types of Input What is a smart phone? Ø Users can input and send text messages, graphics, pictures, video clips, and sound files p. 175 Fig. 5 -14 Next

Other Types of Input What is a Tablet PC? Ø Ø Mobile computer Primary Other Types of Input What is a Tablet PC? Ø Ø Mobile computer Primary input device is a pressure-sensitive digital pen p. 175 Fig. 5 -15 Next

Other Types of Input What is a digital camera? Ø Ø Allows you to Other Types of Input What is a digital camera? Ø Ø Allows you to take digital pictures Images viewable immediately on camera § § p. 175 Fig. 5 -16 Download to computer Post pictures to Web Next

Other Types of Input What is resolution? Ø Ø Ø Number of horizontal and Other Types of Input What is resolution? Ø Ø Ø 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 § p. 176 Greater the number of pixels, the better the image quality Next

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

Other Types of Input What is a PC video camera and a Web cam? Other Types of Input What is a PC video camera and a Web cam? Ø PC video camera — DV camera used to capture video and still images, and to make video telephone calls on Internet c § Ø c Also called PC camera Web cam — 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 p. 176 Fig. 5 -17 c c Next

Other Types of Input What is video conferencing? Ø Two or more geographically separated Other Types of Input What is video conferencing? Ø Two or more geographically separated people who use a network or the Internet to transmit audio and video data p. 176 Fig. 5 -18 Next

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

Other Types of Input What is a scanner? Ø Light-sensing device that reads printed Other Types of Input What is a scanner? Ø Light-sensing device that reads printed text and graphics § p. 177 Fig. 5 -19 Used for image processing, converting paper documents into electronic images Next

Other Types of Input What is a turnaround document? Ø Document that you return Other Types of Input What is a turnaround document? Ø Document that you return to the company that sent it § p. 177 Fig. 5 -20 Portion you return has information printed in OCR characters Next

Other Types of Input What is an optical reader? Ø Device that uses light Other Types of Input What is an optical reader? Ø Device that uses light source to read characters, marks, and codes and then converts them into digital data § § § Optical character recognition (OCR) reads typewritten characters Optical mark recognition (OMR) reads hand-drawn pencil marks, such as small circles Bar code reader p. 177 - 178 Fig. 521 Next

Other Types of Input What is an RFID reader? Ø Reads information on the Other Types of Input What is an RFID reader? Ø Reads information on the tag via radio waves § p. 178 Fig. 5 -22 Can be handheld devices or mounted in a stationary object Next

Other Types of Input What is a magnetic stripe card reader? Ø Ø Reads Other Types of Input What is a magnetic stripe card reader? Ø Ø 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 p. 179 Fig. 5 -23 Next

Other Types of Input What is a magnetic-ink character recognition (MICR) reader? Ø Ø Other Types of Input What is a magnetic-ink character recognition (MICR) reader? Ø Ø Can read text printed with magnetized ink Banking industry almost exclusively uses MICR for check processing p. 179 Fig. 5 -24 Next

Other Types of Input What is a point of sale (POS) terminal? Ø Records Other Types of Input What is a point of sale (POS) terminal? Ø Records purchases, processes credit or debit cards, and updates inventory p. 180 Fig. 5 -25 Next

Other Types of Input What is an automated teller machine (ATM)? Ø Self-service banking Other Types of Input What is an automated teller machine (ATM)? Ø Self-service banking machine that connects to a host computer through a network p. 180 Fig. 5 -26 Next

Other Types of Input What is biometrics? Ø Authenticates person’s identity by verifying a Other Types of Input What is biometrics? Ø 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 p. 181 Fig. 5 -27 Next

Other Types of Input What are examples of biometric technology? Ø Ø Ø Voice Other Types of Input What are examples of biometric technology? Ø Ø Ø 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 § p. 181 Fig. 5 -28 Biometric data is sometimes stored on smart card, which stores personal data on microprocessor embedded in card Next

What is Output What is output? Ø Data that has been processed into a What is Output What is output? Ø Data that has been processed into a useful form § p. 182 Fig. 5 -29 Output device is any hardware component that can convey information to one or more people Next

Display Devices What is a display device? Ø Output device that visually conveys text, Display Devices What is a display device? Ø Output device that visually conveys text, graphics, and video information § Ø Typically used with desktop computers Monitor houses display device as separate peripheral p. 183 - 184 Fig. 531 Next

Display Devices What is an LCD monitor? Ø Ø Ø Uses liquid crystal display Display Devices What is an LCD monitor? Ø Ø Ø Uses liquid crystal display Have a small footprint Mobile devices that contain LCD displays include Ø 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 p. 184 Fig. 5 -30 Next

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

Display Devices What is a plasma monitor? Ø Uses gas plasma technology § p. Display Devices What is a plasma monitor? Ø Uses gas plasma technology § p. 185 Fig. 5 -32 Larger screen size and richer colors than LCD, but are more expensive Next

Display Devices What is a CRT monitor? Ø Ø Contains cathode-ray tube (CRT) Common Display Devices What is a CRT monitor? Ø Ø Contains cathode-ray tube (CRT) Common sizes are 15, 17, 19, 21, and 22 inches § p. 186 Fig. 5 -33 Viewable size is diagonal measurement of actual viewing area Next

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

Printers What is a printer? Ø Ø Output device that produces text and graphics Printers What is a printer? Ø Ø Output device that produces text and graphics on a physical medium Purchasing a printer p. 187 Fig. 5 -34 Next

Printers What are the various ways to print documents and pictures? Click to view Printers What are the various ways to print documents and pictures? Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Printing Digital Camera Images below Chapter 5 p. 188 Fig. 5 -35 Next

Printers What is a nonimpact printer? Ø Forms characters and graphics without striking paper Printers What is a nonimpact printer? Ø Forms characters and graphics without striking paper § Ink-jet printer sprays tiny drops of liquid ink onto paper Ø 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 p. 189 Fig. 5 -36 Next

Printers What is a photo printer? Ø Ø Ø Color printer that produces photolab-quality Printers What is a photo printer? Ø Ø Ø Color printer that produces photolab-quality pictures Many photo printers have a builtin card slot Pict. Bridge is a standard technology that allows you to print pictures directly from a digital camera p. 190 Fig. 5 -37 Next

Printers What is a laser printer? Ø Ø Ø High-speed, high-quality nonimpact printer Prints Printers What is a laser printer? Ø Ø Ø 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 p. 190 - 191 Fig. 538 Next

Printers What is a thermal printer? Ø Generates images by pushing electrically heated pins Printers What is a thermal printer? Ø Generates images by pushing electrically heated pins against heat-sensitive paper § p. 191 Fig. 5 -39 Dye-sublimation printer, (also called a digital photo printer) uses heat to transfer dye to specially coated paper Next

Printers What is a mobile printer? Ø Small, lightweight, battery-powered printer that allows mobile Printers What is a mobile printer? Ø Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, PDA, or smart phone while traveling p. 192 Fig. 5 -40 Next

Printers What is a plotter? Ø Ø Sophisticated printer used to produce high-quality drawings Printers What is a plotter? Ø Ø Sophisticated printer used to produce high-quality drawings Large-format printer creates photo-realistic-quality color prints p. 192 Fig. 5 -41 Next

Printers What is an impact printer? Ø Forms characters by striking mechanism against inked Printers What is an impact printer? Ø 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 p. 192 - 193 Fig. 542 Next

Other Output Devices What is an audio output device? Ø Ø Computer component that Other Output Devices What is an audio output device? Ø Ø 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 p. 193 - 194 Fig. 543 Next

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

Other Output Devices What is a facsimile (fax) machine? Ø Device that transmits and Other Output Devices What is a facsimile (fax) machine? Ø Device that transmits and receives documents over telephone lines What is a fax modem? Ø Modem that allows you to send and receive electronic documents as faxes p. 194 Fig. 5 -44 Next

Other Output Devices What is a multifunction peripheral? Ø Provides functionality of a printer, Other Output Devices What is a multifunction peripheral? Ø Provides functionality of a printer, scanner, copy machine, and fax machine p. 194 Fig. 5 -45 Next

Other Output Devices What is a data projector? Ø Device that takes the text Other Output Devices What is a data projector? Ø Device that takes the text and image from computer screen and projects it onto larger screen p. 195 Fig. 5 -46 Next

Putting It All Together What are suggested input and output devices for the home Putting It All Together What are suggested input and output devices for the home user? Home User Input 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 p. 196 Fig. 5 -47 Output Device • 17 - or 19 -inch color LCD monitor • Ink-jet color printer; or • Photo printer • Speakers • Headphones or earphones Next

Putting It All Together What are suggested input and output devices for the small Putting It All Together What are suggested input and output devices for the small office/home office user? SOHO User Input 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 p. 196 Fig. 5 -47 Output Device • 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-andwhite or color) • Fax machine • Speakers Next

Putting It All Together What are suggested input and output devices for the mobile Putting It All Together What are suggested input and output devices for the mobile user? Mobile User Input 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 p. 196 Fig. 5 -47 Output Device • 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 inoffice use (black-andwhite or color) • Photo printer • Fax modem • Headphones or earphones • Data projector Next

Putting It All Together What are suggested input and output devices for the power Putting It All Together What are suggested input and output devices for the power user? Power User Input 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 p. 196 Fig. 5 -47 Output Device • 23 -inch LCD monitor • Laser printer (black-andwhite or color) • Plotter or large-format printer; or • Photo printer; or • Dye-sublimation printer • Fax machine or fax modem • Speakers • Headphones or earphones Next

Putting It All Together What are suggested input and output devices for the large Putting It All Together What are suggested input and output devices for the large business user? Large Business User Input 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 p. 196 Fig. 5 -47 Output 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 Next

Input and Output Devices for Physically Challenged Users What input devices are available for Input and Output Devices for Physically Challenged Users What input devices are available for those with physical limitations? Ø Ø Keyboards with larger keys Head-mounted pointer controls pointer on screen p. 197 Fig. 5 -48 Next

Input and Output Devices for Physically Challenged Users What other output options are available Input and Output Devices for Physically Challenged Users What other output options are available for visually impaired users? Ø Ø Ø 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 p. 197 Fig. 5 -49 Next

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