Big Red Switch
= B =
Big Room n.
(Also `Big Blue Room') The extremely
large room with the blue ceiling and intensely bright light (during
the day) or black ceiling with lots of tiny night-lights (during
the night) found outside all computer installations. "He can't
come to the phone right now, he's somewhere out in the Big Room."
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.