| Abbreviation | Definition |
|---|---|
| PCISD | Post Covid Impact on Social Development |
| PCNE | Philippine Conference on New Evangelization |
| PCO | Professional Conference Organization |
| PCO | professional conference organizer |
| PCRC | Pacific Coast Research Conference |
| PCSC | Pacific Coast Softball Conference |
| PCSD | Pacific Conference on Spectroscopy and Dynamics |
| PCSI | Patient Classification Systems International |
| PCTC | Penn Conference in Theoretical Chemistry |
| PCVC | Personal Computer Video Conference |
| PDC | Participatory Design Conference |
| PDC | Professional Developers Conference |
| PDC | Professional Development Conference |
| PDCS | Professional Development and Conferencing Services |
| PDIS | International Conference on Parallel and Distributed Information Systems |
| PDS | Python Document Script |
| PEC | Physical Electronics Conference |
| PEC | Professional Education Conference |
| PEC | Professional Educational Conference |
| PECORA | William T. Pecora Memorial Symposium on Remote Sensing |