QA - Quality Assurance
QAM - Quadrature Amplitude Modulation
QAS - Quick Arbitration and Selection
QBE - Query By Example
QBIC - Query By Image Content
QCT - QUALCOMM CDMA Technologies
QDIO - Queued Direct Input/Output
QDOS - Quick and Dirty Operating System
QDR - Quad Data Rate™
QDT - Quiet Drive Technology
QED - Quality Education Data
QEL - Quotation Exchange Language
QFE - Quick Fix Engineering
QFS - Quick File System
QIC - Quarter-Inch Cartridge
QIM - Quantization Index Modulation
QIO - Queued Input/Output
QLLC - Qualified Logical Link Control
QMF - Query Management Facility
QMIS - QMS Management Information System
QMS - QLogic Management Suite
QMS - Queue Management System
QoS - Quality of Service
QP - Quadratic Programming
QPL - Qt Public License
QPM - QoS Policy Manager
QPS - Quark Publishing System™
QPS - Queries Per Second
QPSK - Quadrature Phase-Shift Keying
QPSX - Queue Packet and Synchronous circuit eXchange
QQI - Querier's Query Interval
QQIC - Querier's Query Interval Code
QRSS - Quasi-Random Signal Sequence
QSAM - Queued Sequential Access Method
QSIG - Q Signaling
QSR - Quarter-rack Scalable Router
QT - QuickTime
QTMA - QuickTime Music Architecture
QTS - Quancept Telephony System™
QTVR - QuickTime Virtual Reality
QWP - Query With Permission
QXGA - Quantum eXtended Graphics Array