OUTPUT DEVICES

An output device is an electromechanical device which accepts data from a computer and translates  them into a form , which is suitable for use by the outside world(users). 

  Output devices can be broadly classified into the following two types;

Soft-Copy Output

Output which is not produced on a paper, is known as softcopy output. They are temporary in nature. For example, output displayed on a terminal screen, or spoken out by a voice response system are softcopy output.

     Advantages:

     1)Easily searchable.

     2)Can be easily updated and modified.

     3)Can be redistributed quickly via E-mail.

     4)Requires very little physical space. A CD can hold thousands documents.

Hard-Copy Output

    Output which is produced on a paper, is known as hard copy output. They are permanent in nature. For example, output produced by printers and plotters on paper are hard copy output.  

     Advantages:

     1)Can be used even while computer is not operating.

     2)Any unauthorized change can be detected easily.

     3)Some users like to read information.

    4)Can be redistributed to those persons who do not have computer.

    Types Of Output

    Some types of output are text, graphics , tactile, audio and video. Text consist of characters, no.’s and punctuation marks, or any other symbol requiring one byte of computer storage that are used to create words, sentences and paragraphs. Graphics are digital representation of non text information such as drawing, charts, photographs and animation. Tactile output such as raised line drawings may be useful for some individual who are blind .Audio is music ,speech, or any other sound. Video consists of images play back at speeds to provide the appearance of full motion.

  These examples of output device also include input/output device. Printers and visual displays are the most common types of output device for interfacing to people , but voice is becoming increasing available.

        Examples:

     1)Speakers

    2)Headphones

    3)Screen

    4)Printer

    5)Plotter

    6)Projector

    7)Radio

 

Submitted by:Satwinder kaur 

 Class:B.Sc.1^st(comp.sci)

Roll no.:4213