NOS
- Fascene Airport
- Holley Performance Products
- KA9Q NOS
- NOS (Portuguese company)
- NOS (drink)
- NOS (operating system)
- NOS stereo technique
- National Occupational Standards
- National Ocean Service
- National Office of Statistics
- National Orange Show
- National Orthodox School
- Nederlandse Omroep Stichting
- Neos (airline)
- Network operating system
- New Orleans Saints
- New old stock
- Nitric oxide synthase
- Nitrous oxide
- Nitrous oxide system
- Norway Airlines
- Nos, Book of the Resurrection
- Noss (disambiguation)
- Not Otherwise Specified
- Nós
- PNL (rap duo)