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.
The most common input devices used by the computer are the keyboard and mouse. The keyboard allows the entry of textual information while the mouse allows the selection of a point on the screen by moving a screen cursor to the point and pressing a mouse button. The most common outputs are monitors and speakers.
Visual display unit
A visual display unit (also called VDU, monitor, or screen) offers a two-dimensional visual presentation of information.a device that display information on a screen.
Speaker
A speaker can be used for various sounds meant to alert the user, as well as music and spoken text.
Printer
Printers produce a permanent hard copy of the information on paper.A computerperipheral that place texts on paper.
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