An output device is a part of the computer that displays or present the output  to the user, generated after processing the input data. The output may be in the form of text, image, sound, video etc.
Out put devices can be classified into two
I. Hard copy devices: Devices that provide output on a paper or any other solid surface. This hard copy is portable, can be stored and can be used without a computer.
2.Plotter &
3. Microfiche/Microfilm or Computer Output Microfilm (COM)
II. Soft copy devices: Devices that provide output as visual display, audio, video etc. This soft copy can be accessed only with a computer but can be stored, or even modified and can be shared through e-mail.
4. Monitor
5. Projector
6 Headphone
7. Speaker
7 Examples of Output Devices

1. Printer is an output device, which provide output information on paper.
2. Plotter is a computer printer used for printing vector graphics.
-Used for drawing graphs, maps, computer aided design for buildings and computer aided manufacturing applications etc
3.Computer Output Microfilm (COM) is a system that converts stored data directly to microfilm or microfiche
Cost effective for storing large amount of data for longer periods
-Used in Medical X-rays, storing output in banking and insurance
4. Computer Monitor: most common output device to view the displayed output.
Monitors may be Cathode ray tube (CRT) monitors or Liquid Crystal Display (LCD) monitors. LCD monitors are popular now.
5. Projector: Output device used to project the displayed output onto a large screen
-Used in teaching, conference presentation, training etc
6 and 7. Audio output devices: Headphone and Speaker
Headphone  are a pair of small loudspeakers that are designed to be held in place close to user’s ears. They are also known as earphones.
Speaker: It serves as a voice output device usually used to hear music, speech etc
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