| Abbreviation | Definition |
|---|---|
| PP | Pet Partners |
| PPA | Pennsylvania Psychological Association |
| PPAF | Pakistan Poverty Alleviation Fund |
| PPB | Project Peanut Butter |
| PPF | Peace Parks Foundation |
| PPF | Persecution Project Foundation |
| PPF | Planned Parenthood Foundation |
| PPF | Professional Pilots Federation |
| PPFA | Planned Parenthood Federation of America |
| PPL | Pet Protection League |
| PPNYC | Planned Parenthood of New York City |
| PPO | People Protecting Otters |
| PPP | Peace Papers Packet |
| PPP | Prevention Puppet Project |
| PPS | Partnership for Public Services |
| PQE | Partnerships for Quality Education |
| PRB | Painters' Registration Board |
| PRB | Policy Research Bureau |
| PRB | Population Reference Bureau |
| PRBO | Point Reyes Bird Observatory |