| INAC | inactivation no afterpotential C 
| Others |
| INAC | Indian and Northern Affairs Canada
| Others |
| INAC | Indian Naval Academy Course
| Others |
| INAC | Indigenous and Northern Affairs Canada
| Others |
| INAC | Institute for Nanoscience And Cryogenics
| Others |
| INAC | Instituto Nacional de Aeronautica Civil
| Others |
| INAC | Instituto Nacional de Artes do Circo
| Others |
| INAC | Intelligent Network Access Controller
| Others |
| INAC | Interconnection Network Access Coordinator
| Others |
| INAC | International Neonatology Association Conference
| Others |
| INAC | Interplanetary Ninja Assassin Claptrap
| Others |
| INAC | InterRAI Network of Acute Care
| Others |
| INAC | Isuzu North America Corporation
| Others |