| Rank | Abbreviation | Meaning |
|---|
| ***** | IHAS | Inderpendant Hazardous Asbestos Surveyor
| |
| ***** | IHAS | I Hear America Singing
| |
| **** | IHAS | Institute of Healing Arts and Sciences
| |
| ** | IHAS | Integrated Helicopter Avionics System
| |
| ** | IHAS | Integrated Helmet Assembly Subsystem
| |
| * | IHAS | Institute for the History of Arabic Science
| |
| * | IHAS | Interagency Homeland Air Security
| |
| * | IHAS | Institute for Hydrospheric Atmospheric Sciences
| |
| * | IHAS | Indian Housing Authorities
| |
| * | IHAS | In Home Aide Services
| |
| * | IHAS | Independent Healthcare Advisory Services
| |
| * | IHAS | Icelandic Horse Adventure Society
| |
| * | IHAS | Integrated Healthcare Auditing and Services
| |
| * | IHAS | Integrated Hazard Awareness System
| |
| * | IHAS | Integrated Habitat Assessment System
| |
| * | IHAS | Integrated Hazard Avoidance System
| |
| * | IHAS | Integrated Helicopter Avionics Systems
| |
| * | IHAS | In Home Accommodation Support
| |