| Acronym | Definition |
|---|
| PIAA | Pennsylvania Interscholastic Athletic Association |
| PIAA | Physician Insurers Association of America |
| PIAA | Printing Industries Association of Australia |
| PIAA | Property Investors Association of Australia |
| PIAA | Property Investment Association of Australia |
| PIAA | Pet Industry Association of Australia Ltd. |
| PIAA | Personal Injury Auto Accident |
| PIAA | Private Investigator's Association of Arkansas, Inc. |
| PIAA | Public Involvement and Aboriginal Affairs (Canada) |
| PIAA | Push It All Aside (Alisha's Attic song) |
| PIAA | Professional Insurance Agents of Arkansas, Inc. |