What does KOO stand for?

H. Koon, Inc. - NCIC firearms make code (NCIC)

Kongolo - Zaire - Airport symbol (OAG)

Konjo - Language code (ETLW)

Sportco - NCIC boat manufacturer code (NCIC)

Sportco of Minden Inc., Minden, LA - Manufacturer code for watercraft hull identification number (USCG)