| PACI | Partial Anterior Circulation Infarct 
| Others |
| PACI | Partnering Against Corruption Initiative
| Others |
| PACI | Partnerships for Advanced Computational Infrastructure
| Others |
| PACI | Passenger Address & Crew Interphone
| Others |
| PACI | Payload and Attitude Control Interface
| Others |
| PACI | Port Arthur Collegiate Institute
| Others |
| PACI | Prince Albert Collegiate Institute
| Others |
| PACI | Professional Association of Climbing Instructors
| Others |
| PACI | Public Authority for Craft Industries
| Others |
| PACI | The Public Authority for Civil Information
| Others |