| Acronym | Definition |
|---|
| IHAS➣I Hear America Singing (Walt Whitman poem) |
| IHAS➣Independent Healthcare Advisory Services (UK) |
| IHAS➣Integrated Helmet Assembly Subsystem |
| IHAS➣Interagency Homeland Air Security (Department of Defense, Joint Staff) |
| IHAS➣Integrated Hazard Awareness System |
| IHAS➣Integrated Helicopter Avionics System |
| IHAS➣Integrated Home Automated Solutions |