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, joystick, wheel, light pen, touch screen, stylus, and digital pen Describe other types of input, including voice input; input devices for PDAs, smart phones, and Tablet PCs; digital cameras; voice 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 and headsets, 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 used to enter data or instructions into a computer  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, also called the pointer  Mechanical mouse has rubber or metal ball on its underside mouse buttons wheel button mouse pad ball 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

Video: Alternatives to Your Boring Mouse Beyond the mouse; cool alternatives to mousing around low quality (click to start) high quality (click to start) Next

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 are a joystick and a wheel? p. 171 Fig. 5-7 Next  Joystick is vertical lever mounted on a base  Wheel is steering-wheel-type input device  Pedal simulates car brakes and accelerator

Keyboard and Pointing Devices What is a light pen? p. 171 Fig. 5-8 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. 5-9 Next  Touch areas of screen with finger  Often used with kiosks

Keyboard and Pointing Devices What is a stylus and a digital pen? p. 172 Fig Next  Looks like a ballpoint pen, but uses pressure to write text and draw lines  Used with graphics tablets, flat electronic boards Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Pen Input below Chapter 5

Other Input Devices What is voice input?  Entering data 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 Input Devices 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 Input Devices How is a data entered into a PDA? p. 174 Fig Next

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

Other Input Devices What is a docking station? p. 175 Fig Next  External device that holds mobile computer  Provides connections to peripherals

Other Input Devices 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 Input Devices What is resolution? p. 175 Next  Sharpness and clarity of image  The higher the resolution, the better the image quality, but the more expensive the camera  Pixel (picture element) is single point in electronic image  Greater the number of pixels, the better the image quality

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

Other Input Devices What are 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

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

Other Input Devices 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 Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Scanners below Chapter 5

Other Input Devices What is an optical reader? p. 177 Fig Next  Optical character recognition (OCR) reads characters in OCR font  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 Input Devices 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 Input Devices 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 Input Devices 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 Input Devices p. 179 Fig Next  Can read text printed with magnetized ink  Banking industry almost exclusively uses MICR for check processing

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

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

Other Input Devices 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, called information  Output device is any hardware component that can convey information to one or more people

Display Devices What is a display device? p. 183 Fig Next  Output device that visually conveys information  Information on display device sometimes called soft copy  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, PDA, and Smart Phone Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click LCD Technology below Chapter 5

Display Devices What is a plasma monitor? p. 185 Fig Next  Displays image by applying voltage to layer of gas  Larger screen size and higher display quality 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 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

Printers What is a laser printer? p. 190 Fig Next  High-speed, high-quality nonimpact printer  Prints text and graphics in very 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. 192 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. 193 Fig Next  Computer component that produces music, speech, or other sounds  Speakers and headsets are common devices Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Speakers and Headsets below Chapter 5

Video: Wired Cellular Headsets A guide to the best cellular headsets low quality (click to start) high quality (click to start) Next

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 Web

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 printer, scanner, copy machine, and fax machine

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

Putting It All Together What are suggested output devices for the home user? p. 196 Fig Next

Putting It All Together What are suggested output devices for the small office/home office user? p. 196 Fig Next

Putting It All Together What are suggested output devices for the mobile user? p. 196 Fig Next

Putting It All Together What are suggested output devices for the large business user? p. 196 Fig Next

Putting It All Together What are suggested output devices for the power user? p. 196 Fig Next

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