| Acronym | Definition |
|---|
| HPA➣Health Protection Agency (UK) |
| HPA➣Human Protein Atlas |
| HPA➣Horizontal Pod Autoscaler (computing) |
| HPA➣Hectopascal |
| HPA➣Hawaii Preparatory Academy |
| HPA➣High Power Amplifier |
| HPA➣Host Protected Area (hard disks) |
| HPA➣Harry Potter Alliance (fiction) |
| HPA➣Hybridization Protection Assay (biology) |
| HPA➣High Performance Architecture |
| HPA➣Host Protected Area |
| HPA➣Hamburg Port Authority (Germany; est. 2005) |
| HPA➣High Pressure Air |
| HPA➣High Physical Activity (exercise) |
| HPA➣High Point Academy (middle school; Pasadena, CA) |
| HPA➣High Performance Applications |
| HPA➣High Performance Analog |
| HPA➣Health Policy and Administration (education program) |
| HPA➣High Performance Automotive |
| HPA➣Hydraulic Project Approval |
| HPA➣Hazardous Products Act |
| HPA➣Hydrocarbures Polycycliques Aromatiques (French: Polycyclic Aromatic Hydrocarbons) |
| HPA➣Human Platelet Antigen |
| HPA➣Historic Preservation Agency |
| HPA➣Illinois Historic Preservation Agency |
| HPA➣High Performance Application |
| HPA➣High Performance Addressing |
| HPA➣Human-Powered Aircraft |
| HPA➣High Performance Aircraft (aviation) |
| HPA➣Home Price Appreciation |
| HPA➣Hawaii Paroling Authority |
| HPA➣HomePlug Powerline Alliance |
| HPA➣Haunted Pennsylvania (website) |
| HPA➣Hanoi Plan of Action |
| HPA➣Health Plan Administrator |
| HPA➣Hamilton Port Authority (Canada) |
| HPA➣High-Profile Attack (war) |
| HPA➣Health Planning Agency (various locations) |
| HPA➣Hawaii Psychological Association |
| HPA➣Hospital Partners of America (Charlotte, NC) |
| HPA➣Health Policy Authority |
| HPA➣Humberside Police Authority (UK) |
| HPA➣Hermes Precisa Australia |
| HPA➣Hard Physical Address |
| HPA➣High Payoff Activity |
| HPA➣Higher-order Path Adaptation |
| HPA➣Hyperphenylalaninemia, Mild |
| HPA➣Horse Protection Act of 1970 |
| HPA➣Hydraulic Power Assist (Ford) |
| HPA➣High Pressure Alarm |
| HPA➣Hawaii Publishers Association (Kaneohe, HI) |
| HPA➣Hydroxy-Propyl Acrylate |
| HPA➣Homeowner's Protection Act of 1998 |
| HPA➣Hypophyseal-Pituitary Axis |
| HPA➣Histoplasma Capsulatum Polysaccharide Antigen |
| HPA➣Horizontal Planar Array |
| HPA➣Home Page Award |
| HPA➣Higher Polyamine (chemical) |
| HPA➣Hereditary Papulotranslucent Acrokeratoderma |
| HPA➣Half-Power Angle |
| HPA➣Head of Procuring Activity |
| HPA➣Head of Processing Activity |
| HPA➣Hypothalamic-Pituitary-Adrenal/Adrenocortical |
| HPA➣Hydraulic Power Assembly |