English abbreviations from hldi to hm
- HLDI (Harvard Library Digital Initiative)
- HLF (Hultsfred-Vimmerby Air Base)
- HLFX (Half-Life FX)
- HLG (Wheeling Ohio County Airport)
- HLH (Ulanhot Airport)
- HLI (Hollister Municipal Airport (FAA: CVH))
- HLIRG ((celestial object) HyperLuminous Infrared Galaxy, a galaxy that is brighter than 1013 solar luminosities in the infrared)
- HLL (High-Level Language)
- HLM (Park Township Airport)
- HLN (Headline News)
- HLO (Heavy Load-out (Facility))
- HLOS (High Level Output Specification)
- HLP (Halim Perdanakusuma International Airport)
- HLPOA (Higgins Lake Property Owners' Association)
- HLPS (Heavy-Lift Pre-Position Ship)
- HLR (Hood Army Airfield)
- HLS (hoc loco situs (Latin, "laid in this place"))
- H.L.S. (Hoc Loco Situs ("Laid [or Put] in This Place"))
- HLSA (Higher Level Soccer Academy)
- HLSEM (Homeland security and emergency management)
- HLT (Hamilton Airport)
- HLU (High-Level Unit)
- HLV (Helenvale Airport)
- HLVW (Heavy Logistics Vehicle, Wheeled)
- HLW (Hluhluwe Airport)
- HLY (Anglesey Airport (Maes Awyr Môn) / RAF Valley)
- HLZ (Hamilton International Airport)
- HM (Hospital Corpsman)