NOS may refer to: [edit] Business [edit] Geography [edit] Information Technology - Network operating system, a kind of computer software for running local area networks
- Nokia OS, operating system software for Nokia mobile telephones
- NOS (software), the primary operating system for the Control Data Corporation Cyber line of mainframe computers
[edit] Science [edit] Miscellaneous - National Open School, former name for the National Institute of Open Schooling
- Nature Of Science, a phrase commonly used in science education and science studies
- Nederlandse Omroep Stichting, a Dutch broadcaster
- New Orleans Saints, an American football team
- Nine O'Clock Service, an alternative worship service in the 1980s in Sheffield, England.
- Nitrous Oxide Systems, a manufacturer of nitrous systems for high-performance automobiles
- Nos, Book of the Resurrection, a book by Miguel Serrano (original title: Nos: Libro de la Resurrección)
- NOS (drink), a beverage named after Nitrous Oxide Systems
- Not Otherwise Specified, a sub-category frequently used in systems of disease classification such as ICD-10
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