English abbreviations from haca to haj
- HACA (Highbank Area Civic Association)
- HACB (Housing Authority of the City of Bridgeport)
- HACC (Hispanic-American Chamber of Commerce)
- HACCP (Hazard Analysis and Critical Control Point)
- HACR (Helicopter Active Control Rotor)
- HACS (Hendersonville Area Computer Society)
- HACT (Helicopter Active Control Technology)
- HACU (Hispanic Association of Colleges and Universities)
- HAD (Halmstad Airport)
- HADA (Heavy Artillery Drone Armor)
- HAE (Lava Falls Heliport (FAA: AZ15) (Havasupai Airport))
- HAeBe ((celestial object) Herbig AeBe star, a type of pre-main sequence star with strong spectral emission lines)
- HAEMP (High Altitude Electromagnetic Pulse)
- HAEV (High Amplitude Electric Vibrator)
- HAF (Headquarters Air Force)
- HAFEZ (Hostile Aircraft Free Engagement Zone)
- HAG (Heavy Artillery Gun)
- HAGA (Houston Amateur Golf Association)
- HAH (Prince Said Ibrahim International Airport)
- HAHA (Humanists Atheists Heretics And Agnostics)
- HAHO (High Altitude High Opening)
- HAI (Human Awareness Institute)
- HAII (Hydro and Agro Informatics Institute)
- HAIN (Heavenly Angels In Need)
- HAIPE (High Assurance Internet Protocol Encryptor)
- HAIR (Hardcore Alternative Indie Rap)
- HAJ (Hannover Airport)