What does NOO stand for?

Naoro - Papua New Guinea - Airport symbol (OAG)

National Organization Order (USDC)

Naval Oceanographic Office - Also known as NAVOCEANO; formerly, HO, NHO, USNHO

Naval Oceanographic Office, Washington, DC - Inactive - OCLC symbol (OCLC)

Nevada Operations Office - Department of Energy

Nootka - Language code (ETLW)

Norco Auto & Boat, Norco, CA - Manufacturer code for watercraft hull identification number (USCG)

Notice of Obligation - Military (AFM)