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Discovering Computers Fundamentals, 2012 Edition

Discovering Computers Fundamentals, 2012 Edition. Chapter Five: Input. Objectives Overview. See Page 187 for Detailed Objectives. Objectives Overview. See Page 187 for Detailed Objectives. What Is Input?. Input is any data and instructions entered into the memory of a computer.

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Discovering Computers Fundamentals, 2012 Edition

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  1. Discovering Computers Fundamentals, 2012 Edition Chapter Five: Input

  2. Objectives Overview See Page 187 for Detailed Objectives

  3. Objectives Overview See Page 187 for Detailed Objectives

  4. What Is Input? • Input is any data and instructions entered into the memory of a computer Pages 188– 189 Figure 5-1

  5. What Is Input? Page 188

  6. Keyboard and Pointing Devices • A keyboard is an input device that contains keys users press to enter data and instructions into a computer Page 190 Figure 5-2

  7. Keyboard and Pointing Devices • Keyboards on mobile devices typically are smaller and/or have fewer keys • Some phones have predictive text input, which saves time when entering text using the phone’s keypad Page 191 Figure 5-3

  8. Keyboard and Pointing Devices Page 192 Figures 5-5 – 5-7

  9. Touch Screens and Touch-Sensitive Pads • A touch screenis a touch-sensitive display device Page 193 Figure 5-8

  10. Touch Screens and Touch-Sensitive Pads Microsoft Surface Touch-sensitive pads Page 193 Figures 5-9 – 5-10

  11. Pen Input • With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selections Page 194 Figure 5-11

  12. Other Types of Input Page 195 Figure 5-12

  13. Other Types of Input Page 196 Figure 5-13

  14. Other Types of Input Page 197 Figure 5-14

  15. Other Types of Input • Two factors affect the quality of digital camera photos: Page 198

  16. Other Types of Input • Voice inputis the process of entering input by speaking into a microphone • Voice recognitionis the computer’s capability of distinguishing spoken words • Audio inputis the process of entering any sound into the computer Page 198

  17. Other Types of Input • A video conferenceis a meeting between two or more geographically separated people Page 199 Figures 5-16 – 5-17

  18. Other Types of Input • A flatbed scanner creates a file of the document in memory • Works in a manner similar to a copy machine Page 200 Figure 5-18

  19. Other Types of Input • Optical character recognition (OCR)involves reading characters from ordinary documents • A turnaround documentis a document you return to the company that creates and sends it Page 200 Figure 5-19

  20. Other Types of Input • Optical mark recognition (OMR) reads hand-drawn marks such as small circles or rectangles Page 200

  21. Other Types of Input • A bar code reader, also called a bar code scanner uses laser beams to read bar codes Page 201 Figure 5-20

  22. Other Types of Input • RFID (radio frequency identification) uses radio signals to communicate with a tag placed in or attached to an object • An RFID readerreads information on the tag via radio waves • RFID can track: Page 201

  23. Other Types of Input • Magnetic stripe card readersread the magnetic stripe on the back of cards such as: Pages 201 Figure 5-22

  24. Other Types of Input • MICR (magnetic ink character recognition) devices read text printed with magnetized ink • An MICR readerconverts MICR characters into a form the computer can process • Banking industry uses MICR for check processing Page 202 Figure 5-23

  25. Other Types of Input • Biometrics authenticates a person’s identity by verifying a personal characteristic Pages 202 - 203

  26. Other Types of Input iris recognition system fingerprint reader Pages 202 – 203 Figures 5-24 – 5-25

  27. Other Types of Input • A terminal is a computer that allows users to send data to and/or receive information from a host computer Pages 204 – 205 Figures 5-26 – 5-28

  28. What Is Output? • Output is data that has been processed into a useful form Pages 206 – 207 Figure 5-29

  29. Display Devices • A display devicevisually conveys text, graphics, and video information • A monitor is packaged as a separate peripheral • LCD monitor • Widescreen Pages 207 – 208 Figure 5-30

  30. Display Devices • Liquid crystal display (LCD) uses a liquid compound to present information on a display device Page 209

  31. Display Devices • Plasma monitorsare display devices that use gas plasma technology and offer screen sizes up to 150 inches Page 210 Figure 5-32

  32. Display Devices • A CRT monitoris a desktop monitor that contains a cathode-ray tube Page 210 Figure 5-33

  33. Printers • A printer produces text and graphics on a physical medium • Before purchasing a printer, ask yourself a series of questions Page 211 Figure 5-34

  34. Printers • A nonimpact printerforms characters and graphics on a piece of paper without actually striking the paper Page 213

  35. Printers • An ink-jet printerforms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper • Color or black-and-white • Printers with a higher dpi (dots per inch) produce a higher quality output Page 213 Figure 5-36

  36. Printers Page 214

  37. Printers Pages 214 – 215 Figure 5-38

  38. Printers • A multifunction peripheral(MFP) is a single device that prints, scans, copies, and in some cases, faxes • Sometimes called an all-in-one device Page 215 Figure 5-39

  39. Printers • A thermal printergenerates images by pushing electrically heated pins against the heat-sensitive paper Pages 215 – 216 Figure 5-40

  40. Printers • Plotters are used to produce high-quality drawings • Large-format printerscreate photo-realistic quality color prints on a larger scale Page 216 Figure 5-42

  41. Printers • Impact printersform characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper Page 217

  42. Printers • A dot-matrix printerproduces printed images when tiny wire pins on a print head mechanism strike an inked ribbon • A line printerprints an entire line at a time Page 217 Figure 5-43

  43. Other Output Devices • An audio output deviceproduces music, speech, or other sounds Page 217 Figure 5-44

  44. Other Output Devices • Headphones are speakers that cover or are placed outside of the ear • Earbuds (also called earphones) rest inside the ear canal Page 218

  45. Other Output Devices Page 218

  46. Other Output Devices • A data projector is a device that takes the text and images displaying on a computer screen and projects them on a larger screen Page 218 Figure 5-45

  47. Other Output Devices • An interactive whiteboardis a touch-sensitive device, resembling a dry-erase board, that displays the image on a connected computer screen Page 218 Figure 5-46

  48. Input and Output Devices for Physically Challenged Users Head-mounted pointer Braille printer Pages 220 – 221 Figures 5-48 – 5-49

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