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77 CHAPTER INPUT AND OUTPUT. © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved. 7-2 Competencies Define input Describe keyboard entry, pointing.

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Presentation on theme: "77 CHAPTER INPUT AND OUTPUT. © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved. 7-2 Competencies Define input Describe keyboard entry, pointing."— Presentation transcript:

1 77 CHAPTER INPUT AND OUTPUT

2 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved. 7-2 Competencies Define input Describe keyboard entry, pointing devices, & scanning devices Discuss image capturing devices, digitizing devices, & audio input devices

3 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved. 7-3 Competencies cont. Define output Describe monitors, printers, and audio output devices Discuss combination input & output devices

4 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved. 7-4 What is Input? Any data or instructions used by a computer Input devices Hardware Keyboards Mice Scanners Other devices Translates data into a form that the system unit can process

5 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved. 7-5 Keyboard Entry Keyboards Traditional keyboards Flexible keyboards Ergonomic keyboards Wireless keyboards PDA keyboards Features Typewriter keyboard with numeric pad Special purpose keys Toggle and combination keys

6 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved. 7-6 Traditional Keyboard

7 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved. 7-7 Pointing Devices Mouse Mechanical Optical Cordless or wireless Joystick Touch Screen Light Pen

8 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved. 7-8 Scanning Devices Optical scanners Flatbed Portable Bar code readers Handheld wand readers or platform scanners Contain photoelectric cells that read bar codes

9 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved. 7-9 Scanning Devices Character and mark recognition devices Scanners that recognize special characters & marks Magnetic ink character recognition (MICR) Optical-character recognition (OCR) Optical-mark recognition (OMR)

10 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Image Capturing Devices Digital camera Images recorded digitally on a disk Images can be downloaded to a computer Digital video camera Records motion digitally Can take still images as well WebCams Specialized digital video cameras Broadcast images over the Internet

11 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Digitizing Devices Graphics Tablets Digital Notepads

12 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Audio Input Devices Voice Voice recognition systems Discrete-speech recognition systems Continuous-speech recognition system Music Musical Interface Digital Interface (MIDI)

13 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved What is Output? Processed data or information Types of output Text Graphics Audio & video Output devices Monitors Printers

14 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Monitors Known as screens or display screens Output referred to as soft copy Features Resolution Dot pitch Refresh rate Size

15 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved More on Monitors Cathode-ray tube or CRTs Flat-panel Liquid crystal display (LCD) Portable and thinner than CRTs Other monitors E-books Data projectors High-definition television (HDTV)

16 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Printers Translates information that has been processed by the system unit Output referred to as hard copy Features Resolution Color capability Speed Memory

17 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Printers Ink-jet printer Laser printer Personal laser printers Shared laser printers Thermal printer Other printers Dot-matrix Plotters Photo printers

18 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Audio Output Devices Translates audio information into sounds that people can understand Common devices Speakers Headphones

19 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Combination Input and Output Devices Fax machines Multifunction devices Internet telephones Telephony Voice-over IP (VoIP) Terminals

20 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Terminals An input and output device Connects to a mainframe or server Types of terminals Dumb terminal Intelligent terminal Network terminal Internet terminal

21 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved A Look to the Future Neural Signals Inc. Brain machine interface Allows humans to control machines with their thoughts Individuals incapable of communication Physically immobile people

22 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Key Terms active matrix monitor (190) audio input device (185) audio-output device (193) bar code (183) bar code reader (183) bar code scanner (183) cathode ray tube monitor (CRT) (189) character recognition device (183) clarity (189) color capability (printer) (191) combination device (193) combination key (175) continuous-speech recognition system (188)

23 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Key Terms cordless mouse (180) data projector (190) digital camera (184) digital notepad (185) digital video camera (184) digitizing device (185) discrete-speech recognition system (188) display screen (189) dot-matrix printer (192) dot pitch (189) dots-per-inch (dpi) (191) download (184) dual-scan monitor (190) dumb terminal (195) e-book (190) e-book reader (190)

24 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Key Terms facsimile (fax) machine (194) flat-panel monitor (190) Flatbed scanner (183) graphics tablet (185) hard copy (191) Headphones (193) high-definition television (HDTV) (190) host computer (195) image capturing device (184) ink-jet printer (191) input device (178) input (178) intelligent terminal (195) Internet telephone (194) Internet telephony (194)

25 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Key Terms Internet terminal (195) IP Telephony (194) joystick (181) keyboard (178) laser printer (192) light pen (182) liquid crystal display (LCD) (190) Magnetic-ink character recognition (MICR) (183) mark recognition device (183) mark sensing (183) mechanical mouse (180) memory (printer) (191) Musical Interface Digital Interface MIDI (188)

26 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Key Terms MIDI device (188) monitor (189) mouse (180) mouse pad (180) mouse pointer (180) multifunction device (MFD) (194) network computer (195) network terminal (195) numeric keypad (178) optical character recognition (OCR) (183) Optical-mark recognition (OMR) (183) optical mouse (180) optical scanner (182) output (188) output device (188)

27 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Key Terms passive-matrix monitor (190) PC/TV (190) personal laser printer (192) photo printer (192) pixel (picture element) (189) platform scanner (183) plotter (192) pointing (180) pointing device (180) pointing stick (180) portable scanner (183) printer (191) reader/sorter (183) refresh rate (189) resolution (monitor)(189)

28 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Key Terms resolution (printer) (191) roller ball (180) scanner (182) scanning device (182) screen (189) server (195) shared laser printer (192) size (viewable size) (189) soft copy (189) speakers (193) speed (printer) (191) telephony (194) terminal (195) thermal printer (192) thin client (195) thin film resistor monitor (TFT) (190) toggle key (179)

29 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Key Terms touch pad (180) touch screen (181) touch surface (180) trackball (180) Universal Product Code (UPC) (183) voice recognition system (185) voice-over IP (VoIP) (194) wand reader (183) Web appliance (195) WebCam (184) Web camera (184) Web terminal (195) wireless mouse (180)

30 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved FAQs What are pointing devices? I would like to insert several images in a document. How can I capture the images? What are digitizing devices? What is voice recognition? What is the difference between a CRT and an LCD display? What is HDTV?

31 © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved Discussion Questions Describe the three different mouse types designed for input. How does Internet telephony work? Discuss. Discuss the features of multifunctional devices. Describe the features of a monitor that help to make images appear clearer on the screen. What are MIDI devices and how are they used?


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