| PIAC | Pacific International Arbitration Centre 
| Others |
| PIAC | Pakistan International Airlines Corporation
| Others |
| PIAC | Paleo Islands and Archipelago Configuration
| Others |
| PIAC | Palestinian International Arbitration Chamber
| Others |
| PIAC | Parent Involvement Advisory Committee
| Others |
| PIAC | Parent Involvement Advisory Committee (Toronto District School Board)
| Others |
| PIAC | Parent Involvement Advisory Council
| Others |
| PIAC | Patent Information Annual Conference
| Others |
| PIAC | Pension Investment Association of Canada
| Others |
| PIAC | Permanent International Altaistic Conference
| Others |
| PIAC | Phuket International Aesthetic Center
| Others |
| PIAC | Pi Industrial Automotive Controller
| Others |
| PIAC | Polymer Industrial Advisory Council
| Others |
| PIAC | Preventing Infections in Acute Care
| Others |
| PIAC | Program Improvement Advisory Committee
| Others |
| PIAC | Project for Information Access and Connectivity
| Others |
| PIAC | Promoting Independence Advisory Committee
| Others |
| PIAC | Public Improvement Advisory Committee
| Others |
| PIAC | Public Improvements Advisory Committee
| Others |
| PIAC | Public Inquiry and Assistance Center
| Others |
| PIAC | Public Interest Accountability Committee
| Others |
| PIAC | Public Interest Advisory Committee
| Others |
| PIAC | Public Interest Advocacy Centre
| Others |
| PIAC | Public Interest Advocacy Centre (Australia & Canada)
| Others |
| PIAC | Public Interest Advocacy Centre, The
| Others |
| PIAC | Public Interest and Accountability Committee
| Others |
| PIAC | Public Involvement Advisory Council
| Others |
| PIAC | Public Issues and Actions Committee
| Others |