| Abbreviation | Definition |
|---|---|
| QPSA | Quepasa |
| QQQQ | Nasdaq 100 Trust |
| QQQQ | NASDAQ-100 Index Tracking Stock |
| QQR | Res-Care, Inc. options |
| QRSI | QRS Corporation |
| QRSME | Q R S Music Technology, Inc. |
| QRTEA | Qurate Retail Group, Inc. Class A |
| QRTEB | Qurate Retail Group, Inc. Class B |
| QRTEP | Qurate Retail Group, Inc. Preferred |
| QSFT | Quest Software, Inc. |
| QSII | Quality Systems, Inc. |
| QSND | QSound Laboratories, Inc. |
| QSRI | Queen Sand Resources, Inc. |
| QSSY | Q- Seven Systems, Inc. |
| QSTIE | Questec.Com, Inc. |
| QSYS | Quad Systems Corporation |
| QTEK | QUINTEK Technologies, Inc. |
| QTEL | Quintel Communications, Inc. |
| QTMB | Quitman Bancorp, Inc. |
| QTMG | Quantum Group, Inc. |