North American Datum 
Naval Ammunition Depot 
Nanni Diesel 
Network Access Device 
Nicotinamide adenine dinucleotide 
National Advertising Division 
Not actually done 
Nadir Aperture Door 
Namibia Dollar 
Nanggroe Aceh Darussalam 
National Armaments Director 
National Association of the Deaf 
Network Access Devices 
Network Access Domain 
Nicotinamide Adénine Dinucléotide 
Nitric Acid Dehydrate 
no abnormality detected 
no active disease 
No Acute Disease 
no acute distress 
no apparent distress 
NODE ADMINISTRATION 
nuclear accident dosimetry 
nadolol 
Namibian dollar 
National Academy of Design 
National Appeals Division 
National Armament Directors 
National Association for the Deaf 
naval aviation depot