Here is the answer from GURU.net :

National Ocean Service (NOAA)
National Ocean Survey (NOAA)
Naval Ordnance Station
Nederlandse Omroep Stichting
Network Operating System
Network Operations Specialist (Sprint)
Network Optimization System (Sprint)
*New Old Stock*
New Old Stuff
Night Observation System
Nitric Oxide Synthase
Nitrous Oxide Systems
Northern Tropospheric Oxidants Study
Not Otherwise Specified
Novell Operating System
Nuke On Sight
Number Of Sectors

Tim

----- Original Message -----
From: "John Rodgers" <jhrodgers@charter.net>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, May 13, 2001 3:32 PM
Subject: Re: What is NOS

> How about "National Oceanic Survey"?
>
> I know, it's not Van related !
>
> John Rodgers
> 88 GL Driver
>
> Stan Wilder wrote:
> >
> > Thats it very short . What does NOS mean?
>