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The output of a computer can be purely visual, in which case the output device is a monitor, or it can be printed, in which case the output device is a printer; when computers produce sound, the output device is a speaker.
a printer
Output.
no its storage
In Light Emitting Diodes when electron jumps from one state to another state it emits some energy in the form of light. And the light will be different for different type of semi conductor materials used for making for it. So, in conclusion Light in LED is a result of output process.
When customers use a computer to access the Internet, state one output device needed to produce a paper copy of the booking.
A laser printer is an output device.
A video card is part of the output chain but is not an output device on it's own. The monitor is usually the device that is considered an "output device".
The printer is an output device
Output
A speaker is an output device.
Normally it is an output device. However a touchscreen monitor is both an input and output device.