Check all full forms of Q here

CODE	ABBREVIATION
Q	Queue
q=]	Alternative smily with a backward hat on
QA	Quality Assurance / Queue Arbitrated
QAF	Q Adapter Function
QAM	Quadrature Amplitude Modulation
QAS	Quasi-Associated Signaling
QBE	Query By Example
QBIC	Query By Image Content
QBIT	Qualified Bit
QBM	Query By Model
QBOD	Quality Board of Directors
QBP	QuickBooks Pro
QC	Quality Control
QD	Queuing Delay
QDN	Query Direct Number
QDSS	Q-Bus Dragon Sub-System
QEMM	Quarterdeck Extended Memory Manager
QFA	Quick File Access
QFP	Quad Flat Pack
QIC	Quarter Inch Cartridge / Quarter Inch Committee
QIO	Queue Input / Output
QLLC	Qualified Link Level Control / Qualified Logical Link
QMP	Quality Measurement Plan
QMS	Quality Micro Systems
QND	Quantum Network Design
QOH	Quantity On Hand
QOS	Quality Of Service (sometimes as QoS)
QP	Quattro Pro
QPA	Quality Program Analysis
QPSK	Quadrative/Quadrature Phase-Shift Keying
QPSX	Queued Packet and Synchronous circuit eXchange
QR	Quick Response
QRSS	Quasi Random Signal Source
QSIG	Unified International corporate network signalling standard
QSL	Reply
QSO	Conversation / QWK Support Option
QSS	Quality Solution System / Quality Surveillance System
QT	Cutie / Qualification Test / Quick Time
QTAM	Queued Telecommunications Access Method
QTML	QuickTime Media Layer
QTVR	QuickTime Virtual Reality
QTW	Quick-Time for Windows
QVSS	Q-Bus Viper Sub-System
QWEST	Quantum-Well Envelope State Transition