National Bureau of Standards 
Neutral Buoyancy Simulator 
Navy Broadcasting Service 
Narrow Band Sockets 
National Biological Survey 
National Biological Service 
National Budget System 
Natural Black Slate 
New British Standard 
nijmegen breakage syndrome 
normal bowel sounds 
nucleotide binding site 
Narrow Band Socket 
Narrowband Socket 
Narrow-Band Sockets 
NarrowBand Sounder 
NarrowBand Superheterodyne 
NASA Budget System 
National Ballet School 
National Battlefield Site 
National Bibliographic Service 
National Blood Service 
National Board for Nursing, Midwifery… 
National Board of Survey 
National Building Specification 
National Bureau of Statistics 
N-bromosuccinimide 
neonatal Bartter syndrome 
Net Broadcast Service 
Network Based Solution