| Abbreviation | Definition |
|---|---|
| PVSC | IEEE PhotoVoltaic Specialists Conference |
| PVSC | IEEE Photovoltaic Specialists Conference and Exhibition |
| PWITS | Philly Women In Tech Summit |
| PYC | Pilipinx Youth Conference |
| Q | Queue |
| QAW | Quality Attribute Workshop |
| QCCI | Quality Childhood Conference International |
| QCE | Queen's Conference on Education |
| QCI | Quantum Computation and Quantum Information conference |
| QCRT | Quakertown Conference on Reformed Theology |
| QELS | Conference on Quantum Electronics and Laser Science |
| QFS | Quantum Fluids and Solids Conference |
| QHCC | Quaker Hill Conference Center |
| QINOCON | The Qatar Youth Innovation and Entrepreneurship Conference |
| QIS | Quality and Innovation Summit |
| QRT | Ending transmissions. 'INCORRECT!' CHECK WITH 'ARRL' |
| QSC | Qualys Security Conference |
| QSHINE | International Conference on Quality of Service in Heterogeneous Wired/Wireless Networks |
| QSIP | Quantum Structure Infrared Photodetectors Conference |
| QVGA | Quarter Video Graphics Array |