PPA
- Clarence Hudson White
- PPA (complexity)
- Pakistan Pharmacists Association
- Palau Pacific Airways
- Palpatio per anum
- Paraguayan People's Army
- Parahippocampal gyrus
- Parti du Peuple Algerien
- Participatory poverty assessment
- Pascal (unit)
- Pay-per-action
- Pension Protection Act of 2006
- People's Party of Arunachal
- Personal Package Archive
- Phenylpropanolamine
- Philadelphia Parking Authority
- Philippine Ports Authority
- Pickleball in the United States
- Piraeus Port Authority
- Point pattern analysis
- Poker Players Alliance
- Pollution Prevention Act of 1990
- Polyphosphoric acid
- Polyphthalamide
- Popski's Private Army
- Power purchase agreement
- Pre-School Playgroups Association
- Primary progressive aphasia
- Professional Photographers of America
- Professional Publishers Association
- Professional Putters Association
- Progressive Peoples Alliance
- Protestant Protective Association
- Provisional application
- Public Policy and Administration
- Public Procurement Act (Switzerland)
- Purchase price allocation
- Thaon di Revel-class offshore patrol vessel