English abbreviations from hlc to hll
- HLC (Hill City Municipal Airport)
- HLCA (Highland Lakes Condominium Association)
- HLCD (Horn Loaded Compression Driver)
- HLCE (Houghton Lake Community Education)
- HLCF (Holy Land Conservation Foundation)
- HLCH (Happy Life Childrens' Home)
- HLCJ (History of the Lewis and Clark Journals by Paul Cutright)
- HLCL (Herrington Lake Conservation League)
- HLCM (High Limit Control Model)
- HLCO (Helicopter Coordinator)
- HLCP (Hourly Load Calculation Program)
- HLCR (Health Care studies)
- HLCS (HoLoCarboxylase Synthetase)
- HLCT (Honey Lake Conservation Team)
- HLCU (Heterodyne Local Control Unit)
- HLD (Hailar Dongshan Airport)
- HLDD (High-Level Design Document)
- 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)