A green screen is a CRT with only green phosphor, much like that found on older oscilloscope tubes.

Use a green screen and you will be in some bizarre sort of hacker nirvana. I don't know quite what it is about them... they're truly magical. Most green screens are coupled to display adapters that only do text and usually simple graphics, further making the use of a green screen a Zen exercise.

Green screens are peace.

Green screens are power.