These are the first two search results for "NAD":

NAD Electronics
British audio equipment manufacturer of amplifiers, CD players, and tape decks.
www.nadelectronics.com/ - 2k - Cached - Similar pages

National Association of the Deaf
The NAD safeguards the accessibility and civil rights of 28 million deaf and hard of hearing Americans...
www.nad.org/ - 30k - Cached - Similar pages

-G