English abbreviations from halo to hap
- HALO (High Altitude Low Opening, High Activity/Low Observable)
- HALS (Helicopter Automatic Landing System)
- HALT (Hungry Angry Lonely Tired)
- HAM (Amateur radio operator)
- H-AMI (Host Automated Message Interface)
- HAMS (Headquarters and Maintenance Squadron - Marine Aircraft Group (USMC))
- HAN (Health Alert Network)
- HANA (Hispanic Asian and Native American)
- HAND (Humanitarian Aid Network For Distribution)
- HANDLE (Holistic Approach To Neuro Development And Learning Efficiency)
- Hangar "[#]" (A nonexistent hangar (e.g. if there are 4 hangars, then it would be hangar 5) heard most often over the radio that is code for the bathroom/Porta John. Example: "Get me to hangar 5!")
- HANS (Head And Neck Support (device used in many race cars))
- HANYS (Healthcare Association of New York State)
- HAO (Butler County Regional Airport)
- HAOA (Histiocytosis Association Of America)
- HAP (Long Island Airport)