Der or DER may refer to:

Places

Darkənd Darkənd (also, Dər, Dar, and Der) is a village and municipality in the Ordubad District of Nakhchivan, Azerbaijan Azerbaijan, officially the Republic of Azerbaijan, is a Boundaries between the continents, transcontinental and landlock ...

, Azerbaijan *

Dearborn (Amtrak station) The John D. Dingell Transit Center, also known as the Dearborn Transit Center, is an intermodal transit station in Dearborn, Michigan. It is served by Amtrak's ''Wolverine'' line as well as Suburban Mobility Authority for Regional Transporta ...

(station code), in Michigan, US *

Der (Sumer) Der (Sumerian language, Sumerian: 𒌷𒂦𒀭𒆠 ''uruBAD3.ANki''; Akkadian language, Akkadian: 𒌷𒂦𒀭𒆠 ''uruBAD3.ANki'' or ''urude-e-ru(ki)'') was a Sumerian city-state at the site of modern Tell Aqar near Badra, Iraq, al-Badra in Ir ...

, an ancient city located in modern-day Iraq *

d'Entrecasteaux Ridge The d'Entrecasteaux () Ridge (DER) is a double oceanic ridge in the south-west Pacific Ocean, north of New Caledonia and west of Vanuatu Islands. It forms the northern extension of the New Caledonia– Loyalty Islands arc, and is now activel ...

, an oceanic ridge in the south-west Pacific Ocean

Science and technology

Derivative chromosome A derivative chromosome (der) is a structurally rearranged chromosome generated either by a chromosome rearrangement involving two or more chromosomes or by multiple chromosome aberrations within a single chromosome (e.g. an inversion and a deleti ...

, a structurally rearranged chromosome *

Distinguished Encoding Rules X.690 is an ITU-T standard specifying several ASN.1 encoding formats: * Basic Encoding Rules (BER) * Canonical Encoding Rules (CER) * Distinguished Encoding Rules (DER) The Basic Encoding Rules (BER) were the original rules laid out by the AS ...

, a method for encoding a data object, including public key infrastructure certificates and keys *

Distributed Energy Resources Distributed generation, also distributed energy, on-site generation (OSG), or district/decentralized energy, is electrical generation and storage performed by a variety of small, grid-connected or distribution system-connected devices referred ...

∂ The character ∂ (Unicode: U+2202) is a stylized cursive '' d'' mainly used as a mathematical symbol, usually to denote a partial derivative such as / (read as "the partial derivative of ''z'' with respect to ''x''"). It is also used for boundar ...

, the partial derivative symbol *

Derivation (differential algebra) In mathematics, a derivation is a function on an algebra that generalizes certain features of the derivative operator. Specifically, given an algebra ''A'' over a ring or a field ''K'', a ''K''-derivation is a ''K''-linear map that satisfies L ...

on an algebra ''A'' over a field ''K'', the space (module) of which is denoted Der_''K''(A) *

Deep energy retrofit A deep energy retrofit (DER) is an energy conservation project in an existing building that leads to an overall improvement in building performance. While there is no exact definition for a deep energy retrofit, it can be characterized as a whole- ...

, an energy conservation measure

Organizations

Digital Education Revolution The Digital Education Revolution (DER) was an Australian government–funded educational reform program, promised by then prime minister of Australia Kevin Rudd during the launch of his 2007 Australian federal election campaign in Brisbane. It w ...

, former Australian Government-funded educational reform program *

DER rental Radio Rentals was founded in 1930Radio Rentals Staff Handbook by Percy Perring-Thoms in Brighton, Sussex, UK, to rent out radio sets, with a turnover in the first year of £780 (). It later offered televisions and videorecorders for rent. In ...

(Domestic Electric Rentals Ltd), a UK television rentals company *

Documentary Educational Resources Documentary Educational Resources (DER), originally called the Center for Documentary Anthropology, is a US non-profit producer and distributor of film and video in anthropology and ethnology. It has been described by the Harvard Film Archive as ...

, a non-profit film producer and distributor

Other uses

Defence (Emergency) Regulations The Defence (Emergency) Regulations are an expansive set of regulations first promulgated by the British authorities in Mandatory Palestine in 1945, The British repealed them before withdrawing from Palestine in 1948. Along with the entire body ...

, legal regulations promulgated by the British in Mandatory Palestine in 1945 *

Department of Environment Regulation The Department of Water and Environmental Regulation was formed on 1 July 2017, when the Department of Environment Regulation (DER) amalgamated with the Department of Water and the Office of the Environmental Protection Authority. It is respons ...

, former Western Australian state government department * Designated Engineering Representative, an individual appointed to approve, or recommend approval, of technical data to the Federal Aviation Administration {{disambiguation, geo