| PPAD | Parameter Problems in Analytic Dynamics 
| Others |
| PPAD | Partner Protection Assessment From Deformation
| Others |
| PPAD | Petaluma Parents Against Drugs
| Others |
| PPAD | Polynomial Parity Argument Directed
| Others |
| PPAD | Polynomial Parity Argument on Directed
| Others |
| PPAD | Polynomial Parity Arguments on Directed
| Others |
| PPAD | Practical Procedures Aesthetic Dentistry
| Others |
| PPAD | Procurement and Property Administration Directorate
| Others |
| PPAD | Psychiatric Psychological Associates of Durham
| Others |