| Q | Quadrature |
| Q Factor | For a capacitor, inductor or tuned circuit, the Q factor, or Q, is a figure of merit. The higher the Q, the lower the loss and the more efficient the component |
| QAM | Quadrature Amplitude Modulation |
| Q-Factor | Qualicy factor, referring to filters |
| QFN | Quad Flat No Leads |
| QFP | Quad Flat Pack |
| QOE | Quality Of Experience |
| QoS | Quality of Service |
| QPSK | Quadrature Phase Shift Keying |
| QSDG | QoS Development Group |