NTSC

from The Free On-line Dictionary of Computing (8 July 2008)

National Television Standards Committee
NTSC

   <electronics> (NTSC) The body defining the television video
   signal format used in the USA.  The UK equivalent is {PAL}.

   Also, humorously, "Never Twice the Same Colour".

   (1997-07-17)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

NTSC
       National Television Standards Committee (org., USA)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

NTSC
       Never The Same Color (slang)