| QA | Quality Assurance |
| QBD | Charge To Breakdown |
| QC | Quality Control |
| QCM | Quartz Crystal Microbalance |
| QDR | Quick Dump Rinse |
| QFD | Quality Function Deployment |
| QFP | Quad Flat Pack |
| QFPN | Quad Flat Pack Nonleaded |
| QIC | Quartz Inlet Capillary |
| QMS | Quadrupole Mass Spectrometer |
| QSR | Quality System Review |
| QTAT | Quick Turnaround Time |