| Acronym | Definition |
|---|
| IAD | Internal Affairs Division (police) |
| IAD | Integrated Access Device |
| IAD | Integrated Access Device (audiocodes) |
| IAD | IETF (Internet Engineering Task Force) Administrative Director |
| IAD | Internet Addiction Disorder |
| IAD | Inter-American Division (Seventh-day Adventist) |
| IAD | Ion-Assisted Deposition |
| IAD | Inter-American Dialogue |
| IAD | It All Depends |
| IAD | Immigration Appeal Division (Canada) |
| IAD | Internal Audit Division |
| IAD | Instituto Agrario Dominicano |
| IAD | Interstate Agreement on Detainers |
| IAD | Internet Access Device |
| IAD | International Association for Danube Research |
| IAD | Internet Address Detectors (Mac OS) |
| IAD | Iterative Application Development |
| IAD | International Automotive Design |
| IAD | Independent ATM Deployer |
| IAD | Illinois Association of the Deaf |
| IAD | Index of American Design |
| IAD | International Academy of Design |
| IAD | Internet Autopsy Database |
| IAD | Internationale Arbeitsgemeinschaft Donauforschung (German: International Association for Danube Research) |
| IAD | Indiana Association of the Deaf |
| IAD | Iowa Association of the Deaf |
| IAD | International Affairs Directorate |
| IAD | Iterative Aggregation-Disaggregation |
| IAD | Washington, DC, USA - Washington-Dulles International (Airport Code) |
| IAD | Immediate Action Directive |
| IAD | Information Access and Delivery |
| IAD | Intelligent Access Devices (Motorola) |
| IAD | Índice Anti-Detonante (Portuguese: anti-knock index) |
| IAD | Idaho Association of the Deaf |
| IAD | Interface Agreement Document |
| IAD | International Amphibian Days |
| IAD | India/Asia Decollement |
| IAD | Internet Acronym Dictionary |
| IAD | Intelligence Analysis Division (NFOIO) |
| IAD | Inband Amplitude Dispersion |
| IAD | Industrial Aero-Derivative |
| IAD | Inventory Availability Date (AT&T) |
| IAD | Inventory Adjustment Document |
| IAD | Integrated Antenna Detector |
| IAD | Initial Advance Date |
| IAD | Internal Automatic Defibrillator (cardiology) |
| IAD | Integrated Acquisition Database |
| IAD | Instructor Assisted Deployement (skydiving) |
| IAD | Interface Adapter Device |
| IAD | Integrated Acoustic Display |
| IAD | Inventory Adjustment Decrease |
| IAD | Intranet/Intranet Application Development |
| IAD | Islamische Akademie Deutschland eV (Germany) |
| IAD | Information and Analysis Division (various meanings) |
| IAD | Iraqi Army Division |