What does JAH stand for?

Glencoe Public Library, Glencoe, IL - OCLC symbol (OCLC)

Jack Helms Co., Irmo, SC - Manufacturer code for watercraft hull identification number (USCG)

Jah Hut - Language code (ETLW)

John Adams House (SAUO)

Journal of African History - A publication

Journal of American History - A publication (BRI)