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Anatomy of a Digital Computer: Output Devices: Display Screen, Printer, Plotter, Sound Cards and Speakers, 3D-Audio

Illustration: Anatomy of a Digital Computer: Output Devices: Display Screen, Printer, Plotter, Sound Cards and Speakers, 3D-Audio

Output Devices

Illustration: Output Devices

Display Screen

  • A program is keyed in, the screen (which is similar to a television screen) displays the characters.
  • The user can read the program line by line and make corrections before it is stored or printed on a printer
  • Screen sizes differ from system to system.
  • The standard size is 24 lines by 80 characters. Most systems have provision for scrolling.

Printer

  • Printer is a device that prints text or illustrations on paper and in many cases on transparencies and other media.
  • Printer falls into the following categories.
Illustration: Output Devices

Printer falls into the following categories.

  • Ink-jet Printer
  • Laser Printer
  • Line Printer
  • Thermal Printer

Plotter

Illustration: Output Devices
  • Plotter is a device that draws pictures on paper based on commands from a computer.
  • Plotters differ from printers in that they draw lines using a pen
  • In general, plotters are considerably more expensive than printers.
  • Multicolor plotters use different-colored pens to draw different colors.

Sound Cards & Speakers

Illustration: Output Devices
  • Sound cards are necessary for nearly all CD-ROMs and have become commonplace on modern personal computers.
  • All sound cards support MIDI, a standard for representing music electronically.

3D-Audio

  • 3D audio is a technique for giving more depth to traditional stereo sound.
  • Typically, 3D sound, or 3D audio, is produced by placing a device in a room with stereo speakers.