All articles starting with Q

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.

Qods

Qods, also known as Shahr-e Qods, is a city in Tehran province, Iran, about 20 km west of central Tehran on the Tehran–Karaj corridor, formed in 1989 from four villages.

Qohaito

Qohaito, also spelled Kohaito or Qoahito, is an archaeological plateau in southeastern Eritrea, a major trade stop between Adulis and Aksum, occupied from about 700 BC to around 900 AD.

Qojin

Qojin, daughter of Chinggis Khan and Börte, recorded in Rashid al-Din's Compendium of Chronicles as his oldest child; she married Butu of the Ikires, unlike her sisters' dynastic marriages.

Qoliqoli Cokovata, Ramsar Site no. 2331, is Fiji's second Ramsar Site, designated 16 January 2018: 134,900 ha of customary fishing grounds on Vanua Levu's north coast, part of the 260 km Great Sea Reef (Cakaulevu).

Oct 22, 2026

Qollqa

Qollqa, also spelled colca or qullqa, were the freestanding state storehouses of the Inca Empire, stockpiling food, cloth, and weapons for the army and redistribution.

Qom (district)

Qom County (شهرستان قم) is the single county of Qom province, Iran, coextensive with it; until 1995 a Tehran province county, capital Qom city, a Shiite pilgrimage and clerical center.

Qom (قم)

Qom (قم) is a city in central Iran, 125 km southwest of Tehran, a leading Shiite seminary center and pilgrimage city around the Fatima Masumeh Shrine, with over one million census population and severe water scarcity.

Oct 22, 2026

Qom oral literature

Qom oral literature is the spoken verbal art of the Qom (Toba) people of the Gran Chaco, including advice, ritual prayer, mythic narrative, chronicle, and song.

Qom Province

Qom Province (استان قم), central Iran; capital Qom city. 11,237 km², ~1.2 million people (2016), formed 1995 from Tehran Province. Iran's second pilgrimage center after Mashhad, shrine of Fatima Masoumeh, severe groundwater deficit of 2 billion m³.

Qomolangma Biosphere Reserve

Qomolangma Biosphere Reserve (珠穆朗玛生物圈保护区), a UNESCO MAB site in Xizang, China, designated 2004; the world's highest-altitude biosphere reserve, 3,381,900 ha around Mount Everest, adjoining Nepal's Sagarmatha National Park.

Qonto

Qonto is a French fintech company providing online business accounts and financial-management software for SMEs and freelancers, founded in Paris in 2016 by Alexandre Prot and Steve Anavi.

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.

Qore (title)

Qore is the Kushite royal title meaning 'king' or 'ruler', borne by the kings of Kush and, in the Meroitic period, by reigning queens (kandakes) as well.

Oct 20, 2026

Qornet es Saouda

Qornet es Saouda (Qurnat as Sawda', قرنة السودا), the Black Summit, is Lebanon's and the Levant's highest peak at 3,088 m, the summit of Jabal al Makmel in North Lebanon; a distinct 1,087 m namesake peak lies in Mount Lebanon Governorate.

Oct 15, 2026

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.

Qos-gabri (king of Edom)

Qos-gabri, also written Qaus-gabri, was a king of Edom in the 7th century BC, an Assyrian vassal known from cuneiform inscriptions and a clay bulla from Petra.

Qostanay Oblysy

Qostanay Oblysy (Kostanay Region, Қостанай облысы) is a northern Kazakhstan region established 29 July 1936, capital Kostanay city; 818,400 people, 196,000 km2, produces over 90% of Kazakhstan's iron ore and borders three Russian oblasts.

Sep 29, 2026

qPCR analysis

qPCR analysis, or quantitative PCR, quantifies nucleic acids by monitoring fluorescence in real time as amplification proceeds, converting the threshold cycle into relative expression levels or absolute copy numbers.

Oct 15, 2026

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 algorithm

The QR algorithm, or QR method, is an iterative numerical method for computing the eigenvalues of a square matrix, devised by J. G. F. Francis in 1961.

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.

Oct 15, 2026

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.

QR decomposition

The QR decomposition, also called QR factorization, expresses a matrix A as A = QR with Q orthogonal and R upper triangular, and underlies least-squares fitting and eigenvalue computation.

qRAM and state-preparation oracles for quantum linear algebra

qRAM and state-preparation oracles for quantum linear algebra are the input models for loading classical data into quantum states, whose cost decides whether claimed speedups survive end to end.

Sep 29, 2026

QRISK

QRISK is a clinical risk calculator that estimates a person's ten-year risk of cardiovascular disease from routine primary care data; a QRISK3 score of 10% or more triggers a statin recommendation.

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.

QRS complex

QRS complex: the ECG deflections representing ventricular depolarization; normal duration up to 0.10 s, wide (>120 ms) in ventricular tachycardia, bundle branch block, or pacing; named by Einthoven.

Sep 29, 2026

QRS detection

QRS detection, also known as QRS complex detection, locates the QRS complexes in an electrocardiogram recording, marking each heartbeat so heart rate can be measured.