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Anatomy of a Digital Computer: Output Devices: Display Screen, Printer, Plotter, Sound Cards and Speakers, 3D-Audio
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.
Printer falls into the following categories.
- Ink-jet Printer
- Laser Printer
- Line Printer
- Thermal Printer
Plotter
- 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
- 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.