USN (disambiguation)
USN is an abbreviation for:
- Ubiquitous Sensor Network, network of smart sensors
- Ulsan Airport, the airport in Ulsan, South Korea after the IATA airport code
- United States dollar (next day ) according to ISO 4217 ( standard for currency abbreviations )
- U.S. Navy, Navy of the United States of America, so that a strike force of the armed forces of the United States and one of the seven Uniformed Services of the United States
- Update Sequence Number Journal, a component of NTFS ( file system)
- Disambiguation
- Abbreviation