# DL

DL, dL, or dl may stand for:

## Science and technology
### Electronics and computing

* <dl></dl>, an HTML element used for a definition list
* Deep learning, a field of machine learning
* Description logics, a family of knowledge representation languages
* Delete Line (ANSI), an ANSI X3.64 escape sequence
* Digital library, a library in which collections are stored in digital formats
* Diode logic, 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, a mechanism for a computer program to load a library

#### Telecommunications

* Data link, a computer connection for transmitting data
* Distribution list, a function of e-mail clients
* Downlink, the link from a satellite to a ground station
* Download, 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, a diesel-electric class built by Dalian Locomotive and Rolling Stock Company
* Destroyer leader, a large naval vessel capable of leading a flotilla

### Other uses in science and technology

* Dimensionless quantity (dl, in lower case), the 'per unit' system of measurement
* Decilitre (or deciliter, dL), a unit of measurement of capacity or volume
* Discrete logarithms, in mathematics
* Distance learning, Internet-based education
* HPE ProLiant DL, density line servers
* Dextrorotation and levorotation 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, an ongoing Berlin-based film and media-art platform and/or its annual film festival
* Dominant leittonwechselklänge

## Business

* Dai-ichi Life, an insurance company
* Delta Air Lines (IATA airline code: DL)

### Railroads

* Delaware–Lackawanna Railroad in Pennsylvania, U.S.
* District line, a London Underground line

## Places

* DL postcode area, Darlington, north-east England
* County Donegal, Ireland
* Delanggu railway station, a railway station in Indonesia (station code)
* Detroit Lakes, Minnesota, US

## Politics

* Democracy is Freedom – The Daisy, a former political party in Italy
* Drinking Liberally, a social organization that discusses politics in bars
* Liberal Democracy (France) (Démocratie Libérale), a former political party in France
* Rights and Freedom, a political party in Italy

## Sports

* Defensive lineman, an American/Canadian football player position
* Disabled list, 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, a powerlifting move
* Detroit Lions, a football team in the NFL

## Other uses

* Deputy Lieutenant, a British title
* Diaper lover, a fetish
* Dimension Lengthwise, an International standard size of an envelope (110mm × 220mm, holds ⅓ A4)
* Doctor of Letters, a university degree
* Down-low (disambiguation)
* Driver's license, an official document which states that a person may operate a motorized vehicle
* Number 550, in Roman numerals