What does FHL stand for?

Family History Library - Genealogy (GEAB)

Fiberglass Specialties, Riveria Beach, FL - Manufacturer code for watercraft hull identification number (USCG)

File Header Label (SAUS)

Forest Hydrology Laboratory - Forest Service

Forward Half-Line - Feed

Fraser's House of Lords Reports - Scotland - A publication (DLA)

Friday Harbor Laboratories - Research center (RCD)

Friends Historical Library (SAUO)