IHAS
| 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 |