DL, dL, or dl may stand for:

Science and technology

Electronics and computing

*, an HTML element used for a definition list *

Deep learning Deep learning is a subset of machine learning that focuses on utilizing multilayered neural networks to perform tasks such as classification, regression, and representation learning. The field takes inspiration from biological neuroscience a ...

, a field of machine learning *

Description logic Description logics (DL) are a family of formal knowledge representation languages. Many DLs are more expressive than propositional logic but less expressive than first-order logic. In contrast to the latter, the core reasoning problems for DLs are ...

s, a family of knowledge representation languages * Delete Line (ANSI), an ANSI X3.64 escape sequence *

Digital library A digital library (also called an online library, an internet library, a digital repository, a library without walls, or a digital collection) is an online database of digital resources that can include text, still images, audio, video, digital ...

, a library in which collections are stored in digital formats *

Diode logic Diode logic (or diode-resistor logic) constructs And (logic), AND and Or (logic), OR logic gates with diodes and Resistor, resistors. An active device (vacuum tubes with control grids in History of computing hardware, early electronic computers ...

, a logic family using diodes * DVD-R DL, a DVD Dual Layer engineering method * DL register, the low byte of an X86 16-bit DX register *

Dynamic loading Dynamic loading is a mechanism by which a computer program can, at run time, load a library (or other binary) into memory, retrieve the addresses of functions and variables contained in the library, execute those functions or access those var ...

, a mechanism for a computer program to load a library

Telecommunications

Data link A data link is a means of telecommunications link, connecting one location to another for the purpose of transmitting and receiving digital information (data communication). It can also refer to a set of electronics assemblies, consisting of a t ...

, a computer connection for transmitting data *

Distribution list A distribution list is an application of email client programs that allows a user to maintain a list of email addresses and send messages to all of them at once. This can be referred to as an ''electronic mailshot''. Sending mail using a distrib ...

, a function of e-mail clients *

Downlink In a telecommunications network, a link is a communication channel that connects two or more devices for the purpose of data transmission. The link may be a dedicated physical link or a virtual circuit that uses one or more physical links or shar ...

, the link from a satellite to a ground station *

Download In computer networks, download means to ''receive'' data from a remote system, typically a server such as a web server, an FTP server, an email server, or other similar systems. This contrasts with uploading, where data is ''sent to'' a remote ...

, a transfer of electronic data

Vehicles

* Subaru DL, an automobile * Australian National DL class, a class of diesel locomotives built by Clyde Engineering *

New Zealand DL class locomotive The New Zealand DL class of diesel-electric locomotives was manufactured for KiwiRail by CRRC Dalian with engines from MTU. They were the most powerful diesel-electric locomotives in service in New Zealand until the introduction of the DM lo ...

, a diesel-electric class built by Dalian Locomotive and Rolling Stock Company *

Destroyer leader Destroyer leader (DL) was the United States Navy designation for large destroyers from 9 February 1951 through the early years of the Cold War. United States ships with hull classification symbol DL were officially frigates from 1 January 1955Blac ...

, a large naval vessel capable of leading a flotilla

Other uses in science and technology

*⟨dl⟩, a

digraph Digraph, often misspelled as diagraph, may refer to: * Digraph (orthography), a pair of characters used together to represent a single sound, such as "nq" in Hmong RPA * Ligature (writing), the joining of two letters as a single glyph, such as " ...

; see List of Latin script digraphs. *

Dimensionless quantity Dimensionless quantities, or quantities of dimension one, are quantities implicitly defined in a manner that prevents their aggregation into unit of measurement, units of measurement. ISBN 978-92-822-2272-0. Typically expressed as ratios that a ...

(dl, in lower case), the 'per unit' system of measurement *

Decilitre The litre ( Commonwealth spelling) or liter (American spelling) (SI symbols L and l, other symbol used: ℓ) is a metric unit of volume. It is equal to 1 cubic decimetre (dm3), 1000 cubic centimetres (cm3) or 0.001 cubic metres (m3). A cubic ...

(or deciliter, dL), a unit of measurement of capacity or volume * Discrete logarithms, in mathematics *

Distance learning Distance education, also known as distance learning, is the education of students who may not always be physically present at school, or where the learner and the teacher are separated in both time and distance; today, it usually involves online ...

, Internet-based education * HPE ProLiant DL, density line servers *

Dextrorotation and levorotation Optical rotation, also known as polarization rotation or circular birefringence, is the rotation of the orientation of the plane of polarization about the optical axis of linearly polarized light as it travels through certain materials. Circul ...

or D/L nomenclature, used in naming chemical compounds

Arts and entertainment

* ''D.L.'' (play), a Bulgarian play * DL series, a series of adventures and some supplementary material for the ''Advanced Dungeons & Dragons'' role playing game * D. L. Hawkins, fictional character on the American television series ''Heroes'' * D. L. Hughley (born 1963), American actor and comedian *

Directors Lounge Directors Lounge (abbreviation: DL) is an ongoing Berlin-based film and media-art platform with year-round screenings and exhibitions in Berlin and various other cities. Annually parallel to the Berlin Film Festival (February), the central event of ...

, an ongoing Berlin-based film and media-art platform and/or its annual film festival *

Dominant leittonwechselklänge Parallel and counter parallel chords are terms derived from the German (''Parallelklang'', ''Gegenparallelklang'') to denote what is more often called in English the "relative", and possibly the "counter relative" chords. In Hugo Riemann ...

Business

Dai-ichi Life , or Dai-ichi Life for short, is the third-largest life insurer in Japan by revenue, behind Japan Post Insurance and Nippon Life. Founded on September 15, 1902, Dai-Ichi was one of the oldest mutual insurance companies in Japan until a motion to ...

, an insurance company *

Delta Air Lines Delta Air Lines, Inc. is a Major airlines of the United States, major airline in the United States headquartered in Atlanta, Georgia (U.S. state), Georgia, operating nine hubs, with Hartsfield–Jackson Atlanta International Airport being its ...

(IATA airline code: DL) *

Pangdonglai Pangdonglai (lit. “fat Donglai” Simplified Chinese: 胖东来, Traditional Chinese: 胖東來) is a retail corporation founded in March 1995 by Yu Donglai (于东来). It operates a chain of malls and grocery stores and is headquartered in ...

, retail corporation in Xuchang, Henan, China

Railroads

* Delaware–Lackawanna Railroad in Pennsylvania, U.S. *

District line The District line is a London Underground line running from in the east and Edgware Road tube station (Circle, District and Hammersmith & City lines), Edgware Road in the west to in west London, where it splits into multiple branches. One br ...

, a London Underground line

Places

* DL postcode area, Darlington, north-east England *

County Donegal County Donegal ( ; ) is a Counties of Ireland, county of the Republic of Ireland. It is in the Provinces of Ireland, province of Ulster and is the northernmost county of Ireland. The county mostly borders Northern Ireland, sharing only a small b ...

, Ireland * Delanggu railway station, a railway station in Indonesia (station code) *

Detroit Lakes, Minnesota Detroit Lakes is a city and the county seat of Becker County, Minnesota, Becker County, Minnesota, United States. The population was 9,869 at the 2020 United States census, 2020 census. Its unofficial population during summer months is much hi ...

, US

Politics

Democracy is Freedom – The Daisy Democracy is Freedom – The Daisy (, DL), commonly known simply as The Daisy (''La Margherita''), was a Centrism, centrist List of political parties in Italy, political party in Italy. The party was formed from the merger of three parties with ...

, a former political party in Italy * Drinking Liberally, a social organization that discusses politics in bars *

Liberal Democracy (France) Liberal Democracy (, , DL) was a conservative liberalism, conservative-liberal List of political parties in France, political party in France which existed from 1997 to 2002. Led by Alain Madelin, it replaced the Republican Party (France), Repub ...

(''Démocratie Libérale''), a former political party in France * Rights and Freedom, a political party in Italy

Sports

Defensive lineman In gridiron football, a lineman is a player who specializes in play at the line of scrimmage. The linemen of the team currently in possession of the ball are the offensive line (OL), while linemen on the opposing team are the defensive line (D ...

, an American/Canadian football player position *

Disabled list In Major League Baseball (MLB), the injured list (IL) is a method for teams to remove their injured players from the roster in order to summon healthy players. Before the 2019 Major League Baseball season, 2019 season, it was known as the disabl ...

, the former name of the injured list, a list of injured baseball players * Duckworth–Lewis method, a mathematical way to calculate the target score in cricket *

Deadlift The deadlift is a strength training exercise in which a weight-loaded barbell is lifted off the ground to the level of the hips, with the torso perpendicular to the floor, before being placed back on the ground. It is one of the three powerlifting ...

, a powerlifting move *

Detroit Lions The Detroit Lions are a professional American football team based in Detroit. The Lions compete in the National Football League (NFL) as a member of the National Football Conference (NFC) NFC North, North division. The team plays their home game ...

, a football team in the NFL *

Diamond League The Diamond League is an annual series of elite track and field athletic competitions comprising fifteen invitational athletics meetings. The series sits in the top tier of the World Athletics one-day meet competitions. The inaugural season was ...

, track and field league

Other uses

* Deputy Lieutenant, a British title *

Diaper lover Diaper fetishism (American English), or nappy fetishism (British English), is a type of Clothing fetish, garment fetish in which a person derives pleasure from themselves or partners wearing or using a diaper. Diaper fetishism can be performed ...

, a fetish * Dimension Lengthwise, an International standard size of an

envelope An envelope is a common packaging item, usually made of thin, flat material. It is designed to contain a flat object, such as a letter (message), letter or Greeting card, card. Traditional envelopes are made from sheets of paper cut to one o ...

(110mm × 220mm, holds ⅓ A4) *

Doctor of Letters Doctor of Letters (D.Litt., Litt.D., Latin: ' or '), also termed Doctor of Literature in some countries, is a terminal degree in the arts, humanities, and social sciences. In the United States, at universities such as Drew University, the degree ...

, a university degree * Down-low (disambiguation) *

Driver's license A driver's license, driving licence, or driving permit is a legal authorization, or the official document confirming such an authorization, for a specific individual to operate one or more types of motorized vehicles—such as motorcycles, ca ...

, an official document which states that a person may operate a motorized vehicle * Number 550, in

Roman numerals Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Numbers are written with combinations of letters from the Latin alphabet, eac ...

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