15 QAM Quadrature-Amplitude Modulation QAS Quasi-Associated Signaling QBOD Quality Board of Directors QC Quality Cartel QC Quality Control QDSS Q-Bus Dragon Sub-System QMP Quality Measurement Plan QPA Quality Program Analysis QPSK Quadrature Phase-Shift Keying QRSS Quasi Random Signal Source QSO QWK Support Option QSS Quality Solution Systems QSS Quality Surveillance System QVSS Q-Bus Viper Sub-System QZR Quazar