| Acronym | Definition |
|---|
| HPAC | Hyde Park Art Center (Chicago) |
| HPAC | High Performance Affinity Chromatography |
| HPAC | Heating/Piping/Air Conditioning |
| HPAC | Hyogo Performing Arts Center (Japan) |
| HPAC | Hazard Prediction and Assessment Capability |
| HPAC | Heat Pump Air Conditioner |
| HPAC | High-Pressure Air Compressor |
| HPAC | Hunts Point Alliance for Children (Bronx, NY) |
| HPAC | Hacking, Phreaking, Anarchy and Cracking (documentary) |
| HPAC | Helping Prevent Animal Cruelty |
| HPAC | Heating, Plumbing and Air Conditioning |
| HPAC | Health Promotion Access Catalogue (UK) |
| HPAC | Health Policy Action Committee (medical student education) |
| HPAC | Human Powered Alien Craft |
| HPAC | Historic Properties Assistance Contribution |
| HPAC | Hazard Prediction Analysis Code |