A Funny acronym that makes its way in Movie Scripts to this day is the cryptic MOS.
“The man on the TV is speaking MOS.” Is how the usage reads in many cases.
What does it mean?
MOS means silent. We don’t hear the man on TV.
Huh?
Why? Why is it called MOS?
Director Eric von Stroheim used this trick a lot in movies. He was from Austria, and his usual speech was, “We’ll shoot this mit out sound.”
Hence – MOS.