| Acronym | Definition |
|---|
| PACS | Picture Archiving and Communication System (DICOM) |
| PACS | Physics and Astronomy Classification Scheme |
| PACS | Physical Access Control System |
| PACS | Pan American Climate Studies |
| PACS | Patto Civile di Solidarietà (Italian: civil pact of solidarity; gay civil union) |
| PACS | Personal Access Communications System (Bellcore, SSC) |
| PACS | Poorest Areas Civil Society (India) |
| PACS | PATRIOT Act Communication System |
| PACS | Picture Archival Computer System |
| PACS | Provisional Army of the Confederate States |
| PACS | Pennyrile Allied Community Services (Hopkinsville, Kentucky) |
| PACS | Partial Anterior Circulation Syndrome (medical) |
| PACS | Phoenixville Area Community Services (Pennsylavnia) |
| PACS | Post-Acute Care Services |
| PACS | Programmable Armament Control Set |
| PACS | Pacific Area Cataloging System |
| PACS | Pathogen Asset Control System (US Defense Threat Reduction Agency) |
| PACS | Programmable Armament Control System |
| PACS | Personal Advanced Communications Systems |
| PACS | Polar Acquisition and Command System |
| PACS | Project Administration and Costing System (Sprint) |
| PACS | Plotting & Combat Summary Display |
| PACS | Procurement Authorities Control System |
| PACS | Physical Access - Cleaning and Sanitizing |
| PACS | Personal Alarm Call Service (Australia) |
| PACS | Parental Account of Symptoms |
| PACS | Pediatric Activity Card Sort (occupational therapy assessment tool) |