hardware

Out put
Monitor - an electronic visual display with textual and graphical information from the computer. personal computers display.
Printer - a device that produces a permanent human-readable text of graphic document.
Speakers - typically a pair of devices which convert electrical signals into audio.
Headphones - for a single user hearing the audio.

everyone knows it.
just tell me what you want to proof writing this type of topics.
this is basic parts of a computer and monitor is the very important to oprate a PC