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Delta commonly refers to: *
Delta (letter) Delta (; uppercase Δ, lowercase δ or 𝛿; el, δέλτα, ''délta'', ) is the fourth letter of the Greek alphabet. In the system of Greek numerals it has a value of 4. It was derived from the Phoenician letter dalet 𐤃. Letters that come ...
(Δ or δ), a letter of the Greek alphabet *
River delta A river delta is a landform shaped like a triangle, created by deposition (geology), deposition of sediment that is carried by a river and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, res ...
, at a river mouth * D (
NATO phonetic alphabet The (International) Radiotelephony Spelling Alphabet, commonly known as the NATO phonetic alphabet, is the most widely used set of clear code words for communicating the letters of the Roman alphabet, technically a ''radiotelephonic spellin ...
: "Delta") *
Delta Air Lines Delta Air Lines, Inc., typically referred to as Delta, is one of the major airlines of the United States and a legacy carrier. One of the List of airlines by foundation date, world's oldest airlines in operation, Delta is headquartered in Atla ...
, US * Delta variant of SARS-CoV-2 that causes COVID-19 Delta may also refer to:


Places


Canada

* Delta, British Columbia **
Delta (electoral district) Delta is a federal electoral district in British Columbia, Canada, that was represented in the House of Commons of Canada from 1988 to 1997 and since 2015. History The 1988–1997 edition of this riding was created in 1987 from parts of Fr ...
, a federal electoral district **
Delta (provincial electoral district) Delta was the name of a provincial electoral district in the Canadian province of British Columbia based on the municipality of Delta at the mouth of the Fraser River between the city of Vancouver and the US border. It made its first appearance o ...
* Delta, Ontario


United States

*
Mississippi Delta The Mississippi Delta, also known as the Yazoo–Mississippi Delta, or simply the Delta, is the distinctive northwest section of the U.S. state of Mississippi (and portions of Arkansas and Louisiana) that lies between the Mississippi and Yazoo ...
*
Delta, Alabama Delta is a census-designated place and unincorporated community in Clay County, Alabama, United States. Its population was 260 as of the 2020 census. Geography Climate The climate in Delta is characterized by hot, humid summers and generally mild ...
* Delta Junction, Alaska *
Delta, Colorado Delta is a home rule municipality that is the county seat and the most populous municipality of Delta County, Colorado, United States. The town population was 9,035 at the 2020 United States Census. The United States Forest Service headquarter ...
*
Delta, Illinois Delta is an unincorporated community in Carrier Mills Township, Saline County, Illinois, United States. Delta is located along the Canadian National Railway The Canadian National Railway Company (french: Compagnie des chemins de fer nationa ...
*
Delta, Iowa Delta is a city in Keokuk County, Iowa, Keokuk County, Iowa, United States. The population was 264 at the 2020 United States Census, 2020 census. Geography Delta is located at (41.324112, -92.329481). According to the United States Census Bureau ...
*
Delta, Kentucky Delta is an unincorporated community in Wayne County, Kentucky Kentucky ( , ), officially the Commonwealth of Kentucky, is a state in the Southeastern region of the United States and one of the states of the Upper South. It borders Illino ...
*
Delta, Louisiana Delta is a village in Madison Parish, Louisiana, United States. The population was 239 at the 2000 census. It is part of the Tallulah Micropolitan Statistical Area. As the birthplace of African-American entrepreneur Madam C.J. Walker, the fir ...
*
Delta, Missouri Delta is a city in Cape Girardeau County, Missouri, United States. The population was 376 at the 2020 census. It is part of the Cape Girardeau–Jackson, MO- IL Metropolitan Statistical Area. Name A post office called Delta was established in ...
*
Delta, North Carolina Delta is an unincorporated area, unincorporated community in Stokes County, North Carolina, Stokes County, North Carolina, United States. Unincorporated communities in Stokes County, North Carolina Unincorporated communities in North Caroli ...
*
Delta, Ohio Delta is a village in Fulton County, Ohio, United States. The population was 3,103 at the 2010 census. History The first settlement at Delta was made in the 1830s. A post office called Delta has been in operation since 1837. The village was incor ...
*
Delta, Pennsylvania Delta is a borough in York County, Pennsylvania, United States, and one of the southernmost communities in Pennsylvania. The population was 706 at the 2020 census. It is served by the South Eastern School District which provides a public education ...
*
Sacramento–San Joaquin River Delta The Sacramento–San Joaquin River Delta, or California Delta, is an expansive inland river delta and estuary in Northern California. The Delta is formed at the western edge of the Central Valley by the confluence of the Sacramento and San ...
, California *
Delta, Utah Delta is the largest city in Millard County, Utah, United States. It is located in the northeastern area of Millard County along the Sevier River and is surrounded by farmland. The population was 3,436 at the 2010 census. History Delta was ori ...
*
Delta, Wisconsin Delta is a town in Bayfield County, Wisconsin, United States. The population was 273 at the 2010 census. The unincorporated communities of Delta and Pike River are located in the town. The unincorporated community of Sutherland is located partia ...
, a town *
Delta (community), Wisconsin Delta is a census-designated place in the town of Delta, Bayfield County, Wisconsin Wisconsin () is a state in the upper Midwestern United States. Wisconsin is the 25th-largest state by total area and the 20th-most populous. It is bord ...
*
Delta County (disambiguation) Delta County is the name of several counties in the United States: * Delta County, Colorado *Delta County, Michigan *Delta County, Texas See also *Delta (disambiguation) Delta commonly refers to: * Delta (letter) (Δ or δ), a letter of the Gr ...


Elsewhere

*
Delta Island Delta Island is an island long, lying close southeast of Lambda Island and east of Alpha Island in the Melchior Islands, Palmer Archipelago. The name, derived from the fourth letter of the Greek alphabet, was probably given by Discovery Investig ...
, Antarctica *
Delta Stream Delta Stream () is a small meltwater stream flowing from Howard Glacier into Lake Fryxell in Taylor Valley, Victoria Land. It was first studied on the ground by Troy L. Pewe during U.S. Navy Operation Deepfreeze, 1957–58, and so named by him bec ...
, Antarctica *
Delta, Minas Gerais Delta is a Brazilian municipality located in the west of the state of Minas Gerais. Its population was estimated to be 10,768 people living in a total area of . The city belongs to the mesoregion of Triângulo Mineiro and Alto Paranaíba and to t ...
, Brazil *
Nile Delta The Nile Delta ( ar, دلتا النيل, or simply , is the delta formed in Lower Egypt where the Nile River spreads out and drains into the Mediterranean Sea. It is one of the world's largest river deltas—from Alexandria in the west to Po ...
, Egypt *
Delta, Thessaloniki Delta ( el, Δέλτα) is a municipality in the Thessaloniki regional unit, Central Macedonia, Greece. The seat of the municipality is the town Sindos. The municipality of Delta covers an area of 311.09 km2. Municipality The municipality ...
, Greece * Delta State, Nigeria *
Delta, Astrakhan Oblast Delta (russian: Дельта) is a rural locality (a settlement) in Buzansky Selsoviet, Krasnoyarsky District Krasnoyarsky District is the name of several administrative and municipal districts in Russia: *Krasnoyarsky District, Astrakhan Oblast ...
, Russia * Colonia Delta, Uruguay


Arts and entertainment


Fictional characters

* Delta Megazord, a zord in '' Power Rangers in Space'' * Deltas, a working class in Aldous Huxley's '' Brave New World''


Film and television

* ''Delta'' (2008 film), Hungary * ''Delta'' (American TV series), 1992 *
Delta (Australian TV series) ''Delta'' is a 1969 Australian TV series, produced and broadcast by ABC-TV in 1969-70. The title is the name of the fictional independent research organisation featured in the series, a freelance scientific consultancy which is called in to pr ...
, 1969 * '' Macross Delta'' or Macross Δ, in the ''Macross'' anime series


Music

*
alt-J Alt-J (stylised as alt-J, real name Δ) are an English indie rock band formed in 2007 in Leeds. Their lineup includes Joe Newman (guitar/lead vocals), Thom Sonny Green (drums), Gus Unger-Hamilton (keyboards/vocals), and formerly Gwilym Sainsbur ...
(∆), British indie band *
Delta blues Delta blues is one of the earliest-known styles of blues. It originated in the Mississippi Delta, and is regarded as a regional variant of country blues. Guitar and harmonica are its dominant instruments; slide guitar is a hallmark of the s ...
, a music style * "Delta", a song by Crosby, Stills & Nash from ''
Daylight Again ''Daylight Again'' is the seventh album by Crosby, Stills & Nash, and their third studio album in the trio configuration. It peaked at No. 8 on the ''Billboard 200'' albums chart, the final time the band has made the top ten to date. Three single ...
'', 1982


Albums

* ''Delta'' (video album), 2003, Delta Goodrem * ''Delta'' (Delta Goodrem album), 2007 * ''Delta'' (Visions of Atlantis album), 2011 * ''Delta'' (Mumford & Sons album), 2018 * ''Delta'', by Shapeshifter, 2013


Other media

* ''Delta'' (magazine), a poetry magazine * ''Delta'' (science magazine) * ''Delta'' (video game), 1987 *
Delta FM Delta FM was a United Kingdom local radio station, broadcasting to East Hampshire, South West Surrey and North West Sussex. The station provided local news, community information, and specialist music programming to the towns of Alton, Hampshire ...
or Delta Radio, a former UK radio station


Businesses and organizations


Companies

*
Delta Air Lines Delta Air Lines, Inc., typically referred to as Delta, is one of the major airlines of the United States and a legacy carrier. One of the List of airlines by foundation date, world's oldest airlines in operation, Delta is headquartered in Atla ...
, US ** Delta Connection, a Delta Air Lines brand *
Delta Bank Delta Bank ( uk, Дельта Банк) was one of the largest commercial banks in Ukraine. It was founded in February 2006 by Ukrainian businessman Mykola Lagun. It had its headquarters in Kyiv. Since 2006 the bank quickly increased due to consume ...
, Ukraine *
Delta Cafés Delta Cafés () is a Portuguese coffee roasting and coffee packaging company headquartered in Campo Maior, Alentejo. The company was founded in 1961 and is among the top market leaders in the Iberian Peninsula. The company belongs to Rui Nabeir ...
, a Portuguese coffee company * Delta Electric Company * Delta Electricity, Australia * Delta Electronics, Taiwan * Delta Faucet Company *
Delta Holding Delta Holding is a Serbian holding company with the headquarters in Belgrade. Delta Holding performs a variety of services, such as agribusiness, real estate and wholesale. It employs around 3,600 people, making it one of the largest non-governm ...
, a Serbian corporation *
Delta Hotels Delta Hotels by Marriott is a four-star brand of hotels and resorts located primarily in North America. Canadian institution Beginnings In June 1962, William Pattison and his business partners opened the 68-room Delport Inn in Richmond, BC. Tha ...
, Canada *
Delta Machinery Delta Power Equipment Corp. designs, manufactures and distributes power woodworking tools under the Delta Machinery brand. History Delta traces its roots to the Delta Specialty Company founded by Herbert Tautz in 1919 in Milwaukee, Wisconsin. Bas ...
, a tool company * Delta Motor Corporation, South Africa * Former
Delta Motors Corporation Delta Motor Corporation was an automobile company from the Philippines established by Ricardo C. Silverio, Sr. It operated under a technical tie-up with Toyota Motor Corporation of Japan,Doner, p. 43 but also produced its own range of small off-r ...
, Philippines * DELTA (Dutch cable operator)


Schools

* Delta State (disambiguation), several universities *
Delta College (disambiguation) Delta College may refer to: * Delta College (Michigan), near Bay City * Delta Technical College, Horn Lake, Mississippi * Louisiana Delta Community College, Monroe, Louisiana * Mississippi Delta Community College, Moorhead, Mississippi * San Joaq ...
*
Delta Academy (disambiguation) Delta Academy may refer to: * Delta Academy (Mississippi) in Marks, Mississippi * Central Delta Academy in Inverness, Mississippi * Delta Streets Academy in Greenwood, Mississippi * Delta Academy in El Paso, Texas * Delta Academy in the Las Vega ...
* Delta Secondary School (disambiguation) * Delta High School (disambiguation) * Delta School District (disambiguation) *
Delta Career Education Corporation Delta Career Education Corporation was a Virginia-based for-profit institution of higher learning that declared bankruptcy in 2018. Twenty one of its campuses were sold to Ancora Education. It was a wholly owned subsidiary of Gryphon Investors, ...
, US *
Delta International University of New Orleans Delta International University of New Orleans or DIU is a post-secondary business school in Baton Rouge, Louisiana, offering online programs in business administration. Programs Program offered is the MBA (Master in Business Administration). Li ...
, Louisiana, US * Delta Schools, Riyadh, Saudi Arabia


Law enforcement

*
Delta (Norwegian police unit) ''Beredskapstroppen'' ( en, Emergency Unit), callsign "Delta", is the police tactical unit of the Norwegian Police Service. Its members are trained to perform dangerous operations such as high-risk arrests and hostage crisis, hostage situations. ...


Military

* Delta Force, U.S. Army special operations * Space Force Delta, US Space Force logo * Delta, a command echelon in the
structure of the United States Space Force The United States Space Force is organized by different units: the Space Staff, the field commands, and the space deltas. The Space Force is organized as one of two coequal military service branches within the Department of the Air Force, the o ...


Other organizations

* STC Delta, a Georgian R&D center *
American Delta Party Rocky De La Fuente ran a third-party campaign for the presidency of the United States in the 2016 United States presidential election, 2016 election. De La Fuente had sought the Democratic Party (United States), Democratic Party's nomination duri ...
, an American political party *
San Francisco Deltas The San Francisco Deltas were an American professional soccer team based in San Francisco, California, United States. Founded in 2016, the team made its debut in the North American Soccer League in 2017. The franchise played its home games at Ke ...
, a soccer team * Delta Omicron, a music fraternity


Finance

*
Delta (finance) In mathematical finance, the Greeks are the quantities representing the sensitivity of the price of derivatives such as options to a change in underlying parameters on which the value of an instrument or portfolio of financial instruments is depen ...
, rate of change of a value *
Visa Delta Visa Debit is a major brand of debit card issued by Visa in many countries around the world. Numerous banks and financial institutions issue Visa Debit cards to their customers for access to their bank accounts. In many countries the Visa Debit ...
or Visa Debit, a debit card


People

* Δ, signature of
David Macbeth Moir David Macbeth Moir (5 January 17986 July 1851) was a Scottish physician and writer. Biography Moir was born at Musselburgh on 5 January 1798, the son of Elizabeth Macbeth (1767–1842) and Robert Moir (''d''. 1842). He was educated at Musse ...
(1798–1851), Scottish physician and writer * Delta Burke (born 1956), American actress *
Delta Goodrem Delta Lea Goodrem AM (born November 9, 1984) is an Australian singer, songwriter, and actress. Goodrem signed to Sony Music at the age of 15. Her debut album, '' Innocent Eyes'' (2003), topped the ARIA Albums Chart for 29 non-consecutive week ...
(born 1984), Australian singer * Delta Work, drag queen *
Penelope Delta Penelope Delta (; 1874, Alexandria, Khedivate of Egypt – 2 May 1941, Athens, Greece) was a Greek author. She is widely celebrated for her contributions to the field of children's literature. Her historical novels have been widely read and hav ...
(1874–1941), Greek author * Delta (wrestler) (born 1985), Mexican


Science, technology, and mathematics

* The upper- and lower-case Greek letter
delta Delta commonly refers to: * Delta (letter) (Δ or δ), a letter of the Greek alphabet * River delta, at a river mouth * D (NATO phonetic alphabet: "Delta") * Delta Air Lines, US * Delta variant of SARS-CoV-2 that causes COVID-19 Delta may also re ...
(Δ, δ) are used in many fields to denote a difference in some parameter


Chemistry

* Δ (delta), right-handed isomer in a
coordination complex A coordination complex consists of a central atom or ion, which is usually metallic and is called the ''coordination centre'', and a surrounding array of bound molecules or ions, that are in turn known as ''ligands'' or complexing agents. Many ...
* Delta convention, for designating allenes * Δ is used to specify certain fatty acids


Computing

*
Delta (computer) The following is a list of clones of Sinclair Research's ZX Spectrum home computer. This list includes both official clones (from Timex Corporation) and many unofficial clones, most of which were produced in Eastern Bloc countries. The list does ...
, a Russian ZX Spectrum clone * Delta encoding or delta compression, in computer communications *
Delta timing Delta time or delta timing is a concept used amongst programmers in relation to hardware and network responsiveness. In graphics programming, the term is usually used for variably updating scenery based on the elapsed time since the game last ...
, in relation to hardware and network responsiveness * DELTA, an
OpenVMS OpenVMS, often referred to as just VMS, is a multi-user, multiprocessing and virtual memory-based operating system. It is designed to support time-sharing, batch processing, transaction processing and workstation applications. Customers using Ope ...
debugger


Earth sciences

* Epicentral distance (Δ) *
Subtropical Storm Delta (1972) The 1972 Atlantic hurricane season was a significantly below average season, having only seven named storms, four fully tropical storms (the fewest since 1930) and three subtropical storms. It officially began on June 1, 1972, and lasted u ...
, Atlantic *
Tropical Storm Delta (2005) Tropical Storm Delta was a late-forming tropical storm during the hyperactive 2005 Atlantic hurricane season which struck the Canary Islands as a strong extratropical storm where it caused significant damage. It then crossed over Morocco before ...
, Atlantic *
Hurricane Delta (2020) Hurricane Delta was the record-tying fourth named storm of 2020 to make landfall in Louisiana, as well as the record-breaking tenth named storm to strike the United States in that year. The twenty-sixth tropical cyclone, twenty-fifth na ...
, Atlantic


Mathematics

* Δ, a difference of state between two before and after state schemas in the
Z notation The Z notation is a formal specification language used for describing and modelling computing systems. It is targeted at the clear specification of computer programs and computer-based systems in general. History In 1974, Jean-Raymond Abrial ...
* \delta, the first
Feigenbaum constant In mathematics, specifically bifurcation theory, the Feigenbaum constants are two mathematical constants which both express ratios in a bifurcation diagram for a non-linear map. They are named after the physicist Mitchell J. Feigenbaum. History ...
* Delta connective, a unary connective in
t-norm fuzzy logics T-norm fuzzy logics are a family of non-classical logics, informally delimited by having a semantics that takes the real unit interval , 1for the system of truth values and functions called t-norms for permissible interpretations of conjunctio ...
*
Delta method In statistics, the delta method is a result concerning the approximate probability distribution for a function of an asymptotically normal statistical estimator from knowledge of the limiting variance of that estimator. History The delta method ...
for approximating the distribution of a function * Difference operator (Δ) *
Dirac delta function In mathematics, the Dirac delta distribution ( distribution), also known as the unit impulse, is a generalized function or distribution over the real numbers, whose value is zero everywhere except at zero, and whose integral over the entire ...
( function) * Kronecker delta (\delta_) *
Laplace operator In mathematics, the Laplace operator or Laplacian is a differential operator given by the divergence of the gradient of a scalar function on Euclidean space. It is usually denoted by the symbols \nabla\cdot\nabla, \nabla^2 (where \nabla is the ...
(Δ) * Modular discriminant (Δ) * Symmetric difference (Δ) * Non-inferiority margin (δ) * Δ, a class of sets in the analytical hierarchy, for every natural number ''m'', ''n''


Medicine and biology

*
Delta (ligand) The Notch signaling pathway is a highly conserved cell signaling system present in most animals. Mammals possess four different notch receptors, referred to as NOTCH1, NOTCH2, NOTCH3, and NOTCH4. The notch receptor is a single-pass transmembr ...
, an activator of the notch signaling pathway * DELTA (taxonomy), a data format for descriptions of living things * ''Delta'' (wasp), Old World genus of potter wasps * ''Delta'' (moth) genus, also ''Campydelta'' * Delta variant of SARS-CoV-2 that causes COVID-19 * Delta wave, a brain wave


Vehicles

* Delta (rocket family) * Delta, a tricycle layout *
Daihatsu Delta The Daihatsu Delta is an automotive nameplate that has been used on a variety of Japanese Daihatsu trucks and vans between 1970 and 2010. They have usually been Toyota-based, or otherwise based on models from the Toyota-owned Hino Motors. The t ...
, trucks *
Delta formation Delta formation is a flight pattern where multiple flying objects will come together in a V in order to fly more efficiently. Each trailing object is positioned slightly higher than the one in front, and uses the air moved by the forward object t ...
, V-shaped aircraft formation *
Delta wing A delta wing is a wing shaped in the form of a triangle. It is named for its similarity in shape to the Greek uppercase letter delta (Δ). Although long studied, it did not find significant applications until the Jet Age, when it proved suitabl ...
, a triangular aircraft wing * ''Delta''-class submarine (NATO reporting name), Soviet/Russian SSBN *
GM Delta platform Delta was a General Motors compact front-wheel drive automobile and crossover SUV platform, originally developed by Opel Group. Delta was a successor to the Opel T platform; it also replaced J platform and the Z platform used by the Saturn S ...
, a car platform * Lancia Delta, an Italian rally car * Oldsmobile Delta 88, a GM 1965–1983 *
TrikeBuggy Delta The TrikeBuggy Delta, Bullet and Transformer are a family of American ultralight trikes and powered parachutes, designed and produced by TrikeBuggy of Santa Barbara, California. The aircraft is supplied complete and ready-to-fly.Bayerl, Robby; M ...
, an American ultralight trike


Other uses in science and technology

* Refractory delta, in the roof of an electric arc furnace * Delta, a quadra group used in socionics * Delta baryon, a subatomic particle * Delta circuit, in
three-phase electric power Three-phase electric power (abbreviated 3φ) is a common type of alternating current used in electricity generation, transmission, and distribution. It is a type of polyphase system employing three wires (or four including an optional neutral ...
* Delta robot, a delta-shaped parallel robot *
Ilford Delta Ilford Delta is a series of photographic films manufactured by Harman Technology Limited. Delta films are tabular-grain black-and-white films, and originally released in 400 ISO only to compete with Kodak's T-Max film. Ilford recommends Del ...
, a photographic film


Sport

*
Delta (horse) Delta (1946–1960) was a champion Australian thoroughbred racehorse who raced from a two-year-old to a six year-old from distances of 6 furlongs to 2 miles. Champion jockey Neville Sellwood won 22 races including the 1949 VRC Derby, 1949 C ...
(1946–1960), Australia * Mississippi Valley State Delta Devils and Devilettes, sports teams, Itta Bena, Mississippi, US *
San Francisco Deltas The San Francisco Deltas were an American professional soccer team based in San Francisco, California, United States. Founded in 2016, the team made its debut in the North American Soccer League in 2017. The franchise played its home games at Ke ...
, a soccer team *
Delta (orienteering club) Delta was an orienteering club in western Uusimaa of Finland. It formed in 1992 when three clubs started with joint teams and activities. Delta later dissolved in 2012. Hiidenkiertäjät then promised to keep training the best runners. The initi ...
, a former Finnish club


Other uses

* Delta Dental, an American system * Delta Works, a flood-protection works in the Netherlands * Delta, a font designed by
Aldo Novarese Aldo Novarese (29 June 1920 – 16 September 1995) was an Italian type designer who lived and worked mostly in Turin. Training and career Born in 1920, he entered the G.B. Paravia Typographic School in Turin, where he obtained a diploma. In 193 ...
*
Diploma in Teaching English to Speakers of Other Languages DELTA is an English language teaching (ELT) qualification for experienced Teachers of English as a Foreign Language (TEFL) and Teachers of English to Speakers of Other Languages (TESOL). It is provided by Cambridge English Language Assessment thro ...


See also

*
The Delta (disambiguation) The Delta may refer to: * The Niger Delta, an oil-rich region of Nigeria * The Arkansas Delta, one of the six natural regions of the state of Arkansas * The Mississippi Delta, the distinctive northwest section of the U.S. state of Mississippi that l ...
* Delta model, a strategic management model * Nabla symbol (\nabla), an inverted delta representing del, a vector differential operator * Kronecker delta ( \delta_), a function * Dirac delta ( \delta(x)), a function * \Delta ABC, represents a
triangle A triangle is a polygon with three Edge (geometry), edges and three Vertex (geometry), vertices. It is one of the basic shapes in geometry. A triangle with vertices ''A'', ''B'', and ''C'' is denoted \triangle ABC. In Euclidean geometry, an ...
defined by points A, B and C *
(ε, δ)-definition of limit Although the function (sin ''x'')/''x'' is not defined at zero, as ''x'' becomes closer and closer to zero, (sin ''x'')/''x'' becomes arbitrarily close to 1. In other words, the limit of (sin ''x'')/''x'', as ''x'' approaches z ...
* \Delta \% (%CH), a percentage change operation found on some calculators * \Delta^0_n, a classification in the arithmetical hierarchy * \Delta^1_n, a classification in the analytical hierarchy * \Delta^P_i, a classification in the polynomial hierarchy * ''δ''13C, a measure of the ratio of stable isotopes 13C:12C * ''δ''15N, a measure of the ratio of stable isotopes 15N:14N * ''δ''18O, a measure of the ratio of stable isotopes oxygen-18:oxygen-16 * DeltaWing, a prototype of racing car *
High-leg delta High-leg delta (also known as wild-leg, stinger leg, bastard leg, high-leg, orange-leg, red-leg, dog-leg delta) is a type of electrical service connection for three-phase electric power installations. It is used when both single and three-phase po ...
, a three phase electrical circuit * Delta Delta Delta, a sorority *
Delta function (disambiguation) A Dirac delta function or simply delta function is a generalized function on the real number line denoted by δ that is zero everywhere except at zero, with an integral of one over the entire real line. Delta function may also refer to: * Kronecke ...
*
Task Force Delta (disambiguation) Task Force Delta is a generic military, or quasi-military (police, firefighters, etc), designation for a specific task force — a small temporary unit or detachment configured for a specific purpose or task. (A unit called Task Force Delta is oft ...
*
Delta Force (disambiguation) Delta Force is a United States military special operations unit. The term may also refer to: * Project DELTA, a Vietnam War era United States special forces unit * Delta Force F.C., a Nigerian football club * '' Delta Force: America Strikes Back! ...
*
Delta class (disambiguation) ''Delta'' class may refer to: * ''Delta''-class submarine (russian: link=no, Дельта) Soviet designations ''Project 667B "Murena", Project 667BD "Murena-M", Project 667BDR "Kalmar", Project 667BDRM "Delfin"''; NATO reporting names ''Delta I, ...
*
Delta 1 (disambiguation) Delta 1 may refer to: * Delta One, financial derivatives products that have no optionality and as such have a delta very close to one * Delta One (business class), premier business class product for Delta Air Lines. * Fairey Delta 1, a research a ...
*
Delta 4 (disambiguation) Delta 4 or ''variant'' may refer to: * Delta 4 (developer) defunct British software developer * Delta IV (rocket) U.S. spacelaunch spacerocket * ''Delta''-class submarine including the ''Delta-IV'' subclass * ''Delta IV'' oil field in the Black S ...
* * * and δ * and δ {{disambiguation, geo, given name