| Abbreviation | Definition |
|---|---|
| PLASMA | IEEE International Conference on PLASMA Science |
| PLC | Penn Linguistics Conference |
| PLIMC | Pipe Line Insurers Managers Conference |
| PLMMP | Physics of Liquid Matter: Modern Problems. |
| PLOC | Petroleum Leadership and Outlook Conference |
| PLSC | Privacy Law Scholars Conference |
| PMAC | Prince Mahidol Award Conference |
| PMAC | Professional Makeup Artist Conference |
| PMBC | Pocono Mountain Bible Conference |
| PMG(S) | Personal membership group(s) |
| PMNC | Project Management National Conference |
| PMOC | Petrochemical and Maritime Outlook Conference |
| PMRC | Pharma Market Research Conference |
| PNC | Pacific Northwest Conference |
| PNC | Plea Negotiation Conference |
| PNDC | Pacific Northwest Dahlia Conference |
| PNPM | International Workshop on Petri Nets and Performance Models |
| PNWPHP | Pacific Northwest PHP Conference |
| POC | Pacific Oil Conference |
| POCC | People of Color Conference |