| Abbreviation | Definition |
|---|---|
| PX | Pixel |
| Q | Quantum |
| Q3W | Every-3-Week |
| QALY | Quality Adjusted Life Year |
| QBL | Quarter Beam Length |
| QBTU | Quadrillion British Thermal Units |
| QGL | Quarter Gallon (1 quart) |
| QH | Quality Hour |
| QH | Quarter Hours |
| QKM | QuadratKiloMeter, or square kilometer |
| QP | Quarter Pound |
| QPH | Qualifications Per Hour |
| QPS | Queries per Second |
| QPU | Quick Pascal Units |
| QRT | Quarter |
| QT | Quart |
| qt. | quart |
| QTS | Quarts |
| QTY | Quantity |
| QY | Quarter Year |