Any input device, such as a mouse or keyboard, can manipulate anyhting on the vdu (visual display unit), in this case it can affect what you see on your monitor.
An example of a display device would be: A computer screen, this displays what is happening on the computer system, so that the user can make any changes or modifications.
Electronic programmable device which manipulate process,store and data..
A mouse.
the graphics processor
It is an input device because you are inputting pictures from the camera to the computer. It could also be considered an output device since it can display the pictures on its LCD display.
It's an out put device for presentation of information in visual are tactile form.
A computer is a device that is used to see the input you have given.............
i can do every thing. first we can do web designing and core hardware and c++
The connection to the VDU or display unit.
A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's CRT TV set or monitor. It allows the user to point to displayed objects, or draw on the screen, in a similar way to a touch screen but with greater positional accuracy. A light pen can work with any CRT-based display, but not with LCD screens (though Toshiba and Hitachi displayed a similar idea at the "Display 2006" show in Japan[1]), projectors and other display devices. An input device that utilizes a light-sensitive detector to select objects on a display screen. A light pen is similar to a mouse, except that with a light pen you can move the pointer and select objects on the display screen by directly pointing to the objects with the pen.
A first view of any thing is called display,
Monitor is an output device of computer that show the result of our work display the soft copy of our work.