| qlm | QuickField LabelMover Script |
| qlv | QGis LayerVersion Edit |
| qm3 | Articulate Quizmaker Compressed Data |
| qmb | Quick Menu Builder Saved Data |
| qmbl | LabQuest Results Data |
| qmc | QMTest Test Results Data |
| qmd | Intuit Quicken Backup Data |
| qmdb | APM Planner Map Database |
| qmdl | Qualcomm Extensible Diagnostic Monitor Log |
| qme | Quicken Win v3 Data |
| qmf | Lotus Approach Database Query |
| qml | Q Engine XML Data |
| qml | Intuit Quicken for DOS Memory List File |
| qmt | Intuit Quicken v4 Memory List File |
| qmtf | Intuit Quicken Mac Transfer Format File |
| qmu | Quiver Mutation Data |
| qnt | Chromeleon Quantification Method |
| qnx | Intuit Quicken v4 Index File |
| qpb | Intuit QuickBooks Point of Sale Data |
| qpd | Intuit QuickPay for Windows Data |
| qph | Quicken Price History |
| qph | Intuit Quicken Price History |
| qpl | KaleidaGraph Layout |
| qpst | Qualcomm QPST Data |
| qqe | Quick Quote Data |
| qr2 | Delphi Database Quick Report |
| qrd | BI/Query Result Set Data |
| qrl | QF-Test Run Log |
| qrm | Qworum Message |
| qro | MultiWell Quantized Rotation Data |
| qrq | Q&R Workstation Query Definition |
| qrr | BI/Query Result Set Informations |
| qrs | SlickRun MagicWord Pack |
| qrs | PhysioBank QRS Annotation File |
| qrt | QRT RayTracer Image |
