| Acronym | Definition | External Links | |
| Q |
Queue |
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| QA |
Quality Assurance |
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| QA |
Queue Arbitrated |
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| QAF |
Q Adapter Function |
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| QAM |
Quadrature Amplitude Modulation |
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| QAS |
Quasi - Associated Signaling |
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| QBE |
Query-By-Example |
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| QBIC |
Query By Image Content |
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| QBIT |
Qualified Bit |
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| QBM |
Query By Model |
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| QC |
Quality Control |
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| QD |
Queuing Delay |
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| QDSS |
Q-Bus Dragon Sub-System |
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| QFA |
Quick File Access |
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| QFE |
Quick Fix Engineering |
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| QFP |
Quad Flat Pack |
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| QHD |
Quarter High-Definition (usually as qHD) |
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| QIC |
Quarter Inch Cartridge |
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| QISAM |
Queued Indexed Sequential Access Method |
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| QLLC |
Qualified Link Level Control / Qualified Logical Link Control |
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| QM |
Quality Management |
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| QM |
Quality Monitoring |
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| QMP |
Quality Measurement Plan |
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| QMS |
Quality Micro Systems |
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| QND |
Quantum Network Design |
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| QOH |
Quantity On Hand |
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| QOPE |
Query Optimization in a Protective Environment |
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| QOR |
Query on Release (usually as QoR) |
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| QOS |
Quality Of Service (sometimes as QoS) |
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| QP |
Quattro Pro |
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| QPA |
Quality Program Analysis |
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| QPSK |
Quadrature Phase Shift Keying |
 |
| QPSX |
Queued Packet and Synchronous circuit eXchange |
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| QR |
Quick Response (as in QR Code, 2D barcode format) |
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| QRSS |
Quasi Random Signal Source |
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| QSAM |
Queued Sequential Access Method |
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| QSS |
Quality Solution System / Quality Surveillance System |
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| QT |
Qualification Test |
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| QT |
Quick Time |
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| QTAM |
Queued Telecommunications Access Method |
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| QTML |
QuickTime Media Layer |
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| QTVR |
QuickTime Virtual Reality |
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| QVSS |
Q-Bus Viper Sub-System |
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| QWAVE |
Quality Windows Audio/Video Experience (usually as qWAVE) |
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| QWEST |
Quantum-Well Envelope State Transition |
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