Qnap
QLight
Qi2
QT Quarztechnik
Qti thermistor
Quabbin
QuadTech
Quail Electronics
Quaker
Qualitrol
Quartech
Quantum Devices
Quantum Composers
Quantum
Quantel（新加坡）
Quantel Laser
Quantek
Quartzdyne
Q-lab
Quasar
