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QNX
QNX is a commercial real-time operating system built on a microkernel architecture, created in 1981 by Canadian company Quantum Software Systems, now owned by BlackBerry.
Qoo10 (큐텐)
Qoo10 (큐텐) was a Singapore-headquartered online marketplace operating localized e-commerce platforms across Asia, founded in 2010 as a joint venture of eBay and Gmarket founder Ku Young-bae.
Qorvo
Qorvo is an American semiconductor company based in Greensboro, North Carolina, formed in 2015 by merging RF Micro Devices and TriQuint Semiconductor, making radio frequency chips for mobile devices and defense.
qpOASES
qpOASES is an open-source C++ implementation of the online active set strategy for quadratic programming, created by Ferreau, Potschka, and Kirches for real-time model predictive control.
QR code
The QR code, or Quick Response code, is a two-dimensional barcode developed by DENSO WAVE in 1994 that stores far more data than a traditional barcode.
QR code navigation
QR code navigation is a robot navigation method where floor QR codes serve as fixed references, letting a camera-equipped robot correct dead-reckoning errors between codes.
QRP operation
QRP operation is amateur radio transmitting at low power, defined as 5 W or less on CW and digital modes and 10 W on SSB, popular for kit building and awards.
QSA and QRK radio signal reports
QSA and QRK, together the QSA and QRK code, are radiotelegraph Q-codes for signal reports: QSA grades strength and QRK grades readability, each from 1 to 5.
QSAR model
A quantitative structure–activity relationship (QSAR) model predicts a chemical compound's biological activity or properties from molecular descriptors, and is used in drug discovery and chemical-safety assessment.
QSFP
QSFP (Quad Small Form-factor Pluggable) is a family of hot-pluggable, four-lane transceiver modules, defined by a multi-source agreement in 2006, that connect switches and routers to fiber or copper links.
QSFP-DD
QSFP-DD (Quad Small Form Factor Pluggable Double Density) is a pluggable transceiver form factor that doubles the QSFP family's lanes to eight, supporting 400, 800, and 1600 Gb/s.
QSFP+
QSFP+ (Quad Small Form-factor Pluggable Plus) is a hot-pluggable, four-lane transceiver defined by SFF-8436 that became the dominant form factor for 40 Gigabit Ethernet in data centers.
QSFP28
QSFP28 (Quad Small Form-factor Pluggable 28) is an industry-standard transceiver form factor that carries 100 Gigabit Ethernet over four 25 Gbps lanes, in the same physical size as QSFP+.
QSFP56
QSFP56 (Quad Small Form-Factor Pluggable 56) is a hot-pluggable transceiver form factor, introduced in 2017, that carries 200 Gigabit Ethernet over four lanes at 50 Gb/s each using PAM4 signaling.
QSZ-11
The QSZ-11 (Type 11; 11式手枪) is a compact semi-automatic defensive pistol adopted by China's People's Liberation Army in 2011, chambered in 5.8×21mm and issued to senior officers, pilots, and astronauts.
QSZ-92 (92式手枪)
The QSZ-92, also known as the Type 92 (92式手枪), is a Chinese semi-automatic service pistol that is the standard sidearm of the People's Liberation Army and many Chinese police forces.
Qt (software)
Qt, also known as the Qt framework, is a cross-platform software framework for building applications with C++, QML, and Python, first released by Troll Tech in 1995.
Qt Creator
Qt Creator is a cross-platform integrated development environment for desktop, embedded, and mobile applications, the official IDE of the Qt framework, first released in 2009.
Qt Group
Qt Group Plc, the Finnish software company behind the Qt cross-platform framework, grew out of Trolltech, was acquired by Nokia, and listed on Nasdaq Helsinki in 2016.
QTS Realty Trust
QTS Realty Trust is an American data center company serving hyperscale, enterprise, and government clients, acquired by Blackstone in 2021 for about $10 billion including debt.
Qua Iboe
Qua Iboe is a Nigerian crude oil export terminal in Akwa Ibom State, opened in the 1970s by Mobil, and the light sweet crude grade it ships.
Quabbin Reservoir
Quabbin Reservoir is a man-made drinking water reservoir in central Massachusetts, formed by damming the Swift River Valley between 1939 and 1946 to supply metropolitan Boston.
Quad Cities nuclear power plant
The Quad Cities Generating Station is a two-unit nuclear power plant in Cordova, Illinois, on the Mississippi River, operating since 1972 and run by Constellation Energy Generation.
Quad flat no-leads
Quad flat no-leads (QFN) is a leadless, near-chip-scale integrated-circuit package whose terminals sit flush on the bottom, with an exposed die-attach pad at the center.
Quad flat package
The quad flat package (QFP) is a surface-mount integrated circuit package with gull-wing metal leads extending from all four sides of a flat, rectangular body, widely used for microcontrollers and gate drivers.
Quad-level cell
Quad-level cell (QLC) is a NAND flash memory type that stores four bits per cell across 16 voltage levels, giving higher density and lower cost per gigabyte than TLC.
Quadcam engine
A quadcam engine is an internal combustion engine fitted with four camshafts: a double overhead camshaft head on each bank of a V or horizontally opposed engine.
Quadcopter
A quadcopter, also called a quadrotor, is an aircraft lifted and controlled entirely by four propellers, needing no tail rotor or swashplate, and used widely in aerial robotics research.
Quadratic-programming whole-body control
Quadratic-programming whole-body control is a robot-control method for legged robots that solves a quadratic program each control tick, balancing competing tasks like footsteps, balance, and reaching under physical limits.
Quadrature amplitude modulation
Quadrature amplitude modulation (QAM) is a digital modulation method that encodes data by varying both the amplitude and phase of a carrier wave, used in cable modems, digital television, and Wi-Fi.