| Acronym | Definition |
|---|
| NDAC | not Data Accepted |
| NDAC | National Defense Advisory Commission (US Navy) |
| NDAC | Not Data Accepted (IEEE-488/IEC-625 interface bus) |
| NDAC | New Drug Advisory Committee (various organizations) |
| NDAC | North Dakota Aeronautics Commission |
| NDAC | National Day of the American Cowboy (est. 2004) |
| NDAC | Network Design and Analysis Center (US FEMA) |
| NDAC | National Defense Advisory Council |
| NDAC | National Diving & Activity Centre (Chepstow, Gloucestershire, England) |
| NDAC | New Dragon Asia Corporation (China) |
| NDAC | Nuclear Defense Affairs Committee |
| NDAC | New Denver Ad Club |
| NDAC | National Debt Awareness Campaign |
| NDAC | Northern Dutchess Aquatic Club (Red Hook, NY) |
| NDAC | Naval Data Automation Command |
| NDAC | Network Design & Analysis Capability (US NCS) |