Hardware: Output Devices

An output device is any piece of computer hardware equipment used to communicate the results of data processing carried out by an information processing system (such as a computer) to the outside world.
In computing, input/output, or I/O, refers to the communication between an information processing system (such as a computer), and the outside world. Inputs are the signals or data sent to the system, and outputs are the signals or data sent by the system to the outside.

Some of the Output Devices

Display Devices
A display device is an output device for presentation of information in visual or tactile form (the latter used for example in tactile electronic displays for blind people). When the input information is supplied as an electrical signal, the display is called an electronic display.The Most common form of display devices are the Computer Monitors.


Printers
In computing, a printer is a peripheral which produces a text or graphics of documents stored in electronic form, usually on physical print media such as paper or transparencies. Many printers are primarily used as local peripherals, and are attached by a printer cable or, in most new printers, a USB cable to a computer which serves as a document source.
Impact Printer
Impact printers rely on a forcible impact to transfer ink to the media, similar to the action of a typewriter. The impact printer uses a print head that hits the surface of the ink ribbon, which presses the ink onto the paper. All but the dot matrix printer rely on the use of formed characters, letterforms that represent each of the characters that the printer was capable of printing.
Non Impact Printers
Pen-based plotters were an alternate printing technology once common in engineering and architectural firms. Pen-based plotters rely on contact with the paper (but not impact, per se) and special purpose pens that are mechanically run over the paper to create text and images.
Thermal Printers
Thermal printers work by selectively heating regions of special heat-sensitive paper. Monochrome thermal printers are used in cash registers, ATMs, gasoline dispensers and some older inexpensive fax machines. Colours can be achieved with special papers and different temperatures and heating rates for different colours; these coloured sheets are not required in black-and-white output. One example is the ZINK technology.
Mobile Printers
Mobile Printers are hand held small and portable printers.


Audio Output Devices
Any devices that allow the computer to play audio is an audio audio output device. The most common form of audio output devices are computer speakers.


Other Forms of Output Devices

• Data projector
• Force feedback,etc....