| Acronym | Definition |
|---|
| HAL | Hardware Abstraction Layer |
| HAL | Heuristically-programmed Algorithmic Computer (computer in 2001: A Space Odyssey) |
| HAL | [not an acronym] from 2001: A Space Odyssey |
| HAL | Halliburton (oil service company) |
| HAL | History, Arts and Libraries |
| Hal | Halberd (Runescape gaming) |
| HAL | Hindustan Aeronautics Limited |
| HAL | Hawaiian Airlines (ICAO code) |
| HAL | Home Automated Living |
| HAL | Hybrid Assistive Limb (robotic suit) |
| HAL | Halon (fire protection agent) |
| HAL | Hyper Article En Ligne (Hyper Article on Line) |
| HAL | Holland Amerika Lijn (Dutch: Holland America Line) |
| HAL | Histidine Ammonia-Lyase |
| HAL | Horticulture Australia Ltd. |
| HAL | Hot Air Leveling (technique for laying soldering coating on circuit boards) |
| HAL | Hackers At Large |
| HAL | Health Advisory Level |
| HAL | Hardware Adaptation Layer |
| HAL | Hard Array Logic |
| HAL | Atlantic Halibut |
| HAL | Hyperalimentation |
| HAL | Hand Activity Level |
| HAL | High-Order Assembly Language |
| HAL | Heavy Axle Load (transportation) |
| HAL | High Accident Location |
| HAL | Hardware Artificial Life |
| HAL | Hyperspace Analog to Language |
| HAL | Howard Astronomical League (Howard County, Maryland) |
| HAL | Helicopter Attack Squadron Light (US Navy aviation unit designation used 1967-72 and again 1976-88) |
| HAL | Hargrave-Andrew Library (Monash University, Australia) |
| HAL | Hyper-Algorithmic Logic (Star Bridge Systems Inc. hypercomputer technology) |
| HAL | Horizontal Alert Limit |
| HAL | Hickling Arthurs Low Corporation (Canada) |
| HAL | Humanities, Arts and Languages |
| HAL | Human Access Language (early variation of Lotus 123) |
| HAL | Height Above Landing Area |
| HAL | Historical Annotated Landings (National Marine Fisheries Service database) |
| HAL | Highly Automated Logic |
| HAL | Hypertext Aided Learning |
| HAL | Holston Associated Libraries, Inc. |
| HAL | Halken Laboratories Inc |
| HAL | Homework Access Line |
| HAL | Hyperbaric Airlock |