From the monitor or the monitor is a device that is the most important part in contact with the user directly, because we can see the data that is output via the monitor;
From the monitor screen or display device that is most important. It is the most direct contact with users. Because we can see the data being displayed through our monitors.
Starting from a monitor or display device monitor is most important. As part of a user interface directly. Because we can see the information on the display through the screen.