All articles starting with R
22,461 articles
Regions of Nigeria
The regions of Nigeria were the large territorial units, Northern, Western, and Eastern, joined by Mid-Western in 1963, that governed the country until twelve states replaced them in 1967.
Regions of Peru
Regions of Peru: the 25 first-level divisions (24 departments plus the Constitutional Province of Callao) governed by elected regional governments under the 2002 decentralization laws, with 1,891 municipalities below them.
Regions of Queensland
Regions of Queensland: the areas outside Greater Brisbane, covering about 99 percent of the state. Divided variously into 19 ABS SA4 statistical regions, 13 planning regions, and differing departmental service regions.
Regions of Singapore
Regions of Singapore: the five URA planning regions (Central, North, North-East, East, West) plus the Central Area, subdivided into planning areas under the Master Plan 2025, with regional centres at Woodlands, Jurong Lake District, and Tampines.
Regions of the Philippines
Regions of the Philippines: 18 first-level administrative groupings of provinces under the PSGC, including NCR, CAR, and BARMM; newest is the Negros Island Region (RA 12000, 2024).
Regioselectivity
Regioselectivity is the preferential formation of one constitutional isomer, or regioisomer, over others in a chemical reaction, seen classically in Markovnikov addition and ortho/para direction in aromatic substitution.
Regis B. Kelly
Regis B. Kelly is a cell biologist and neurobiologist at the University of California, San Francisco, known for work on synaptic vesicles and neurotransmitter release.
Régis Debray
Régis Debray (born 1940), French philosopher and writer, also known for Revolution in the Revolution? and as founder of mediology. ENS-trained, Guevara companion jailed in Bolivia, Mitterrand adviser 1981–85, Goncourt member 2011–15.
Regis High School (New York City)
Regis High School, 55 East 84th Street, Manhattan: tuition-free Jesuit college-prep school for Catholic boys, founded 1914 by anonymous donor Julia Grant, first free-standing Jesuit high school in the US.
Régis Peffault de Latour
Régis Peffault de Latour is a French hematologist and professor who heads the Hematology and Bone Marrow Transplant Department at Hôpital Saint-Louis in Paris since 2022.
Regis Philbin
Regis Philbin (1931-2020), American television host of Live! and ABC's Who Wants to Be a Millionaire; Guinness record holder for most hours on camera; Disney Legend 2011.
Regis Prograis
Regis Prograis, "Rougarou", American southpaw super lightweight boxer from New Orleans; WBA and WBC 140-pound world champion; lost title fights to Josh Taylor (2019) and Devin Haney (2023); retired April 2026 at 29-3, 24 KO.
Regis University
Regis University is a private Jesuit Catholic university in Denver, Colorado, founded in 1877 and the only Jesuit institution of higher learning in the Rocky Mountains.
Registan (ریگستان)
Registan (ریگستان), "sandy place" in Persian, is Samarkand's central square framed by three madrasas: Ulugh Beg (1417–1420), Sher-Dor (1619–1636), and Tilya-Kori (1646–1660), heavily restored under Soviet rule and part of a 2001 UNESCO World Heritage site.
Registan Desert
The Registan Desert, also written Rēgistān, meaning "land of sand" in Dari, is a largely stabilized red-dune sand sea of about 25,000 km² in southern Afghanistan.
Register
In linguistics, register is a variety of language used in a particular communicative setting, a concept first named by T. B. Reid in 1956 and studied through corpus-based analysis.
Register (sociolinguistics)
Register (sociolinguistics): a language variety defined by situational characteristics of use rather than by its users, distinct from dialect and genre. Central concepts include Halliday's field, tenor, and mode, and corpus-based multidimensional analysis of register variation.
Register analysis
Register analysis is a linguistic method for describing and comparing registers, the language varieties speakers and writers produce under particular situational conditions, from single features to co-occurring patterns.
Register file
A register file is the processor circuit that holds a CPU's general-purpose registers and provides the read and write ports used to supply operands and store results.
Register machine
A register machine is an abstract computing model, developed in the 1960s, whose registers hold non-negative integers; it is Turing equivalent and defines the same computable functions as Turing machines.
Register rectification campaign
The register rectification campaign (却籍) was a Southern Qi campaign against falsified household registers, begun in 480, whose harsh enforcement provoked Tang Yuzhi's rising of 30,000 followers.
Register renaming
Register renaming is a technique in out-of-order processors that rewrites architectural register names onto physical registers, eliminating false dependencies so independent instructions can execute in parallel.
Register-transfer level
Register-transfer level (RTL) is an abstraction level of digital circuit design in which a circuit is described as registers plus the data paths that transfer values between them.
Registered Cossacks
Registered Cossacks (reiestrovi kozaky) were Ukrainian Cossacks accepted into the Polish-Lithuanian Commonwealth's state service and entered in official registers, first created in 1572 with 300 men.
Registered jack
A registered jack, or RJ connector, is a standardized telecommunication network interface for connecting customer voice and data equipment to a carrier service, with designations like RJ11 and RJ45.
Registered mail
Registered mail, also called registered post, is a secure postal service for valuable items, accepted against a receipt, tracked at every step, and delivered only against a signature.
Registered memory
Registered memory, also known as buffered memory or RDIMM, buffers command and address signals to reduce electrical load, and is the standard memory of enterprise servers and data centers.
Registered nurse
Registered nurse (RN): a licensed nursing professional who provides and coordinates patient care. Requires an approved nursing program and state licensure; about 3.5 million U.S. jobs, median pay $97,550 (May 2025), 6% projected growth 2025-2035.
Registered report
A registered report is a journal-article format in which a study's rationale, design, and analysis plan are peer reviewed and accepted in principle before data are collected, guaranteeing publication regardless of results.
Registered site
Registered site: an area officially registered for its unique features, described by location, boundaries, wildlife and soil data; recorded in registers such as the WDPCA, NatDA, SSSI and Natura 2000 databases.