What does OKH stand for?

Koresh-E Rostam - Language code (ETLW)

Oberkommando des Heeres - Army High Command - German military - World War II

Okha - Former USSR - Seismograph station code, US Geological Survey (SEIS)

Oklahoma Houseboat Manufacturing, Muskogee, OK - Manufacturer code for watercraft hull identification number (USCG)

University of Oklahoma, Health Science Center Library, Oklahoma City, OK - OCLC symbol (OCLC)