| Abbreviation | Definition |
|---|---|
| QCL | Queenstown Casinos Limited |
| QCM | Quality Capital Management, Ltd. |
| QCM | Quality Control Management GmbH |
| QCM | Quimica Central de Mexico |
| QCML | Quality Capital Management, Ltd. |
| QCN | Quality Center Nederland |
| QCN | Queensland Communications & Networking |
| QCP | Quality Control Partners |
| QCPC | Queen Charlotte Power Corporation |
| QCR | Quaker City Raceway |
| QCR | Queen City Reprographics |
| QCS | Quality Computer Services |
| QCS | Quality Control Solutions |
| QCS | Quantum Compliance Systems |
| QCS | Queen City Sound |
| QCSI | Quality Care Solutions Inc |
| QCSI | Quality Cleaning Systems Inc |
| QCSI | Quality Control Solutions Inc |
| QCT | Quad-City Times newspaper |
| QCT | Qualcomm CDMA Technologies |