| Q Com |
| QA1 |
| Qantek |
| QANTEK |
| Q-Cee's / TE Connectivity |
| Qci |
| Qem |
| Qest |
| Qlog |
| Qlogic |
| Qmark |
| Qmc Technology |
| Qms |
| Qoitech |
| Qoitech AB |
| Qorvo |
| Qsac |
| Qsc Audio |
| Qse |
| Qsi |
| Qsm Valve |
| Qsp |
| QST |
| QT Brightek |
| Qt Optoelectronics |
| QT Quarztechnik |
| Qt&E |
| Qtms |
| Qtronix |
| Quad Tech |
| Quadcept |
| Quadra Control |
| Quadram |
| Quadrant Connectors |
| Quadtech |
| QuadTech Europe Inc. |
| Qualcomm |
| Qualcomm RF360 |
| Qualidyne Corp |
| Qualiitrol |
| QUALITROL |
| Qualitrol |
| Qualitrol Hathaway Instruments |
| Quality Measurement |
| Quality Micro System |
| Quality Motion Control |
| Quality Power System |
| Quality Technologies |
| Quallink Technology Inc. |
| Qualogy |
| Qualtech |
| Qualtek |
| Qualtek Electronics |
| Qualtek Electronics Corp. |
| Quantacharo |
| Quantai Systems |
| Quantem |
| Quantrad Corporation |
| Quantronix |
| Quantum |
| Quantum Integration |
| Quantum Microwave Components |
| Quarndon Systems |
| Quartech |
| Quarton, Inc. |
| Quasar |
| Quatech |
| Quatech / B+B SmartWorx |
| Quatechno |
| Quazite Boxes |
| Qube |
| Quectel |
| QUEL |
| Quel Powerline Ltd |
| Querskala |
| Quest Manufacturing |
| Quest Technologies |
| Quest Technology |
| Quest Technology International |
| Quest Technology International, Inc. |
| Questar |
| Questronics |
| Quick Coupling Division |
| Quick Ship Lighting |
| QuickLogic |
| Quicksilver |
| Quickstop |
| Quinco |
| Quincy Air Compressor |
| Quincy Ortman |
| Quindar Electronics |
| Quintex GmbH |
| Quinton |
| Quinton Crane |
| Quipp |
| Qume |
| Qvac |
