| Acronym | Meaning |
| IAD | Immediate Action Directive |
| IAD | Immigration Appeal Division (Canada) |
| IAD | Information & Application Delivery |
| IAD | Information and Analysis Division (various meanings) |
| IAD | Integrated Acoustic Display |
| IAD | Integrated Acquisition Database |
| IAD | Integrated Antenna Detector |
| IAD | Intelligence Analysis Division (NFOIO) |
| IAD | Inter-American Dialogue |
| IAD | Interest Accrual Date (finance) |
| IAD | International Affairs Directorate |
| IAD | Interstate Agreement on Detainers |
| IAD | Inventory Adjustment Decrease |
| IAD | Inventory Adjustment Document |
| IAD | Iraqi Army Division |
| IAD | Islamic Affairs Department (various organizations) |