What does ENH stand for?

Classic English Launch Co., Alexandria, VA - Manufacturer code for watercraft hull identification number (USCG)

Earth Near Horizon - NASA (KSC)

Educable Neurologically Handicapped

Endurance Specialty Holdings - Standard and Poor's company symbol

Enough - Telegraphy (PCTE)

Enshi - China - Airport symbol (OAG)

Hymnal Prayer of Enheduanna (BJA)