NOS explained

NOS may refer to:

Science and technology

Nitrous oxide, also known as nos or laughing gas
Nitric oxide synthase, a class of enzymes
Nitrous oxide system, an internal combustion engine
Not Otherwise Specified, a categorization of illnesses
Network operating system, a type of software
NOS (operating system), a CDC network operating system
KA9Q NOS, a TCP/IP implementation
NOS stereo technique, for audio recording

Businesses and organizations

National Ocean Service, US
National Office of Statistics, Algeria
National Orthodox School, Amman, Jordan
Nederlandse Omroep Stichting, a Dutch public broadcasting corporation
New Orleans Saints, an American football team
Nitrous Oxide Systems, a subdivision of Holley Performance Products, an American automotive company
NOS (Portuguese company)
NOS, the ICAO designator of the now-defunct Norwegian airline, Norway Airlines
NOS, the ICAO designator of the Italian airline Neos

Music

Nos, an opera by Shostakovich
N.O.S, part of the French rap duo PNL

Other uses

National Occupational Standards, UK
National Orange Show, San Bernardino, California, US
New Old Stock, unused old merchandise
NOS (drink), named after Nitrous Oxide Systems
Nos, Book of the Resurrection, a book by Miguel Serrano
Nos. or nos., the numero sign, an abbreviation of "numbers"
Fascene Airport, Nosy Be, Madagascar (IATA code)

See also