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Understanding Input and Output Devices in Computing Environment

Explore the various input and output devices in the computing world, from traditional keyboard entry to image capturing and audio input devices. Learn about monitors, printers, and audio output devices, and discover the functionality of combination input and output devices.

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Understanding Input and Output Devices in Computing Environment

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  1. 7 CHAPTER INPUT AND OUTPUT

  2. Competencies • Define input • Describe keyboard entry, pointing devices, & scanning devices • Discuss image capturing devices, digitizing devices, & audio input devices

  3. Competenciescont. • Define output • Describe monitors, printers, and audio output devices • Discuss combination input & output devices

  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. 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. Traditional Keyboard

  7. Pointing Devices • Mouse • Mechanical • Optical • Cordless or wireless • Joystick • Touch Screen • Light Pen

  8. Scanning Devices • Optical scanners • Flatbed • Portable • Bar code readers • Handheld wand readers or platform scanners • Contain photoelectric cells that read bar codes

  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. 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. Digitizing Devices • Graphics Tablets • Digital Notepads

  12. Audio Input Devices • Voice • Voice recognition systems • Discrete-speech recognition systems • Continuous-speech recognition system • Music • Musical Interface Digital Interface (MIDI)

  13. What is Output? • Processed data or information • Types of output • Text • Graphics • Audio & video • Output devices • Monitors • Printers

  14. Monitors • Known as screens or display screens • Output referred to as soft copy • Features • Resolution • Dot pitch • Refresh rate • Size

  15. 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. Printers • Translates information that has been processed by the system unit • Output referred to as hard copy • Features • Resolution • Color capability • Speed • Memory

  17. Printers • Ink-jet printer • Laser printer • Personal laser printers • Shared laser printers • Thermal printer • Other printers • Dot-matrix • Plotters • Photo printers

  18. Audio Output Devices • Translates audio information into sounds that people can understand • Common devices • Speakers • Headphones

  19. Combination Input and Output Devices • Fax machines • Multifunction devices • Internet telephones • Telephony • Voice-over IP (VoIP) • Terminals

  20. Terminals • An input and output device • Connects to a mainframe or server • Types of terminals • Dumb terminal • Intelligent terminal • Network terminal • Internet terminal

  21. A Look to the FutureNeural Signals Inc. • Brain machine interface • Allows humans to control machines with their thoughts • Individuals incapable of communication • Physically immobile people

  22. 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) Key Terms

  23. 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) Key Terms

  24. 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) Key Terms

  25. 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) Key Terms

  26. 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) Key Terms

  27. 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) Key Terms

  28. 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) Key Terms

  29. 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) Key Terms

  30. 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. 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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