Data Entry: Basics of Computer: Output Devices: Monitor, Printer, Plotter and Speaker

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The monitor is the piece of computer hardware that displays the video and graphics information generated by the computer through the video card. Monitors are very similar to televisions but usually display information at a much higher resolution. Also unlike televisions, monitors are not usually mounted on a wall but instead sit atop a desk.

Image of Moniter

Image of Moniter

Two basic types of monitors are used with microcomputers;

  • Cathode Ray Tube (CRT)

  • Liquid Crystal Displays (LCD)


A printer is an external hardware output device that takes the electronic data stored on a computer or other device and generates a hard copy of it. For example, if you created a report on your computer, you could print several copies to hand out at a staff meeting. Some of the most commonly used printers are:

  • Laser Printer

  • Ink Jet Printer

  • Dot Matrix Printer

  • Line Printer

Image of Printer

Image of Printer


  • A plotter is a computer hardware device much like a printer that is used for printing vector graphics. Instead of toner, plotters use a pen, pencil, marker, or another writing tool to draw multiple, continuous lines onto paper rather than a series of dots like a traditional printer.

  • Plotters usually come in two designs:

    • Flat Bed: Plotters of small size to be kept on table with restriction of paper size.

    • Drum: These plotters are of big size using rolls of paper of unlimited length.


A device that converts analog audio signals into the equivalent air vibrations in order to make audible sound. When CRT monitors were the norm, speakers designed for computers were shielded to avoid magnetic interference with the CRT’s magnetic coil. Getting Smaller All the Time.

Image of Speaker

Image of Speaker

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