N - North 
N - November 
N - November Time Zone 
N-ISDN - Narrowband ISDN 
N-TFS - New Tactical Forecast System 
N/A - Not Applicable 
N/E - Non Effective 
NA - Navy 
NA - North Africa 
NAA - North Atlantic Alliance 
NAADM - North American Air Defense Mod… 
NAAFI - Navy, Army, Air Force Institut… 
NAASW - Nonacoustic Anti-submarine War… 
NAAWS - NATO Anti-Air Warfare System 
NAB - Naval Air Base 
NAB - Naval Amphibious Base 
NAC - National Agency Check 
NAC - Network Access Controller 
NAC - No Apparent Change 
NAC - North Atlantic Council 
NACA - National Advisory Committee for… 
NACAA - National Advisory Committee fo… 
NACAM - National COMSEC Advisory Memor… 
NACC - Net Assessment Coordinating Com… 
NACDF - National Area Coverage Data Fi… 
NACIC - National CI Center 
NACIPB - National CI Policy Board 
NACOB - National CI Operations Board 
NACSI - National COMSEC Instruction 
NACSIM - National Communications Secur…