English abbreviations from hat to haz
- hat (Haitian Creole language (ISO 639-2 code))
- HATE (Hug And Tease Everyone)
- HATEOAS (Hypermedia As The Engine Of Application State)
- HATMD (High Altitude Tactical Missile Defense)
- HATR (Hazardous Air Traffic Report)
- HATS (History Arts Tours And Shopping)
- HATT (Help Authoring Tools And Techniques)
- hau (Hausa language (ISO 639-2 code))
- HAV (José Martí International Airport)
- HAVEN (Home And Values Educational Network)
- HAW (Heavy Antitank Weapon)
- Hawg (Nickname for the A - 10 Thunderbolt II)
- HAWK (Homing-All-the-Way-Killer (US))
- HAWK-I (Healthy and Well Kids in Iowa)
- HAWK PCP (Hawk Platoon Command Post)
- HAX (Hatbox Field)
- HAY (Haycock Airport)
- HAYSTAQ (HAve You STored Answers to Questions yet?)
- HAZ (Heat-Affected Zone)