OCN
OCN stands for:
- OCLC Control Number , unique control number for every WorldCat entry, assigned by the Online Computer Library Center
- Opaskwayak Cree Nation , First Nation of the Western Swampy Crees around The Pas in Manitoba, Canada
- Orion Cinema Network
- Oceanside Municipal Airport (IATA code), Oceanside (California) Airport , California
- Open Computer Network , the largest Internet service provider in Japan, operated by Nippon Telegraph and Telephone Communications
–OCN stands for: