sort by Rank | Alpha
| Possible Meanings | Rank |
| Historic American Landscape Survey | **** |
| Hindered Amine Light Stabilizers | *** |
| Hindered Amine Light Stabilisers | *** |
| Houston Area Library System (Houston, TX) | *** |
| Harvard Asia Law Society | *** |
| Historic American Landscapes Survey | *** |
| Health Activities Literacy Scale | *** |
| Helicopter Autonomous Landing System | *** |
| High Approach Landing System | *** |
| Health andActivity Limitations Survey | ** |
| highly anisotropic low-spin | ** |
| highly axial low spin | ** |
| Health and Activity Limitation Surveys | ** |
| Health and Activity Limitations Surveys | ** |
| Haringey Adult Learning Services | ** |
| Health and Lifestyle Survey | ** |
| Health Activity Limitation Survey | ** |
| Head of Administration Legal Services | ** |
| Heliport Approach Lighting System | * |
| Health and Limitation Survey | * |
| Home Assistance Loan Scheme | * |
| Hydrographic Airborne Laser Sounder | * |
| High Altitude Launch System | * |
| Housing Association Leasing Scheme (same as HAL) | * |