# DM

DM, Dm, dm, or D.M. may stand for:

## Academic titles and postnominals

* Doctor of Management, an academic management degree
* Doctor of Medicine, commonly known as M.D. but archaically abbreviated as D.M.
* Doctor of Music, an academic music-performance degree, also known as DMA

## Arts, entertainment, and media
### Broadcasting

* Danger Mouse (TV series), a British animated television series
* WWDM, a radio station licensed to Sumter, South Carolina, United States

### Gaming

* Deathmatch (video games), a gameplay mode integrated into first-person shooter computer games
* Dungeon Master, the game designer, storyteller and referee in Dungeons & Dragons

### Music

* D minor, a minor scale or chord
* DM (album), 2017, by Mexican singer Dulce María
* "DM" (song), 2022, by fromis_9
* Dance marathon, a multiple-day charity event on U.S. college campuses
* Depeche Mode, an English synthpop band formed in 1980
* Drum major (marching band), the leader of a marching band
* Death Metal, an extreme subgenre of heavy metal music

### Social media

* Digital marketing
* Private message (also direct message or dm)

## In business and economics

* Deutsche Mark (1948–2002), the former currency of Germany (and West Germany)
** East German mark (1951–1990)

## Companies and products

* Detroit and Mackinac Railway
* dm-drogerie markt, a German drugstore chain
* Dr. Martens, a brand of boots
* DM, IATA code of Arajet
* DM, then IATA code of Maersk Air, a former Danish airline which operated from 1969 until 2005

## Military

* Designated marksman, a soldier fulfilling the marksman role in an infantry squad
* Royal Naval Armaments Depot, Defense Munitions, sites are prefixed DM
* A US Navy hull classification symbol: Light minelayer (DM)

## Places

* Davis–Monthan Air Force Base, Tucson, Arizona, US
* Des Moines, Iowa, the state capital
* Dominica, an island nation in the Caribbean Sea (ISO 3166-1 alpha-2 code: DM)

## Science, technology, and mathematics
### Computing

* .dm, Dominica's top-level Internet domain
* Dimensional modeling, a set of techniques and concepts used in data warehouse design

#### Software

* Display Manager, a window system for Domain/OS on Apollo/Domain workstations
* Device mapper, a component of the Linux kernel that supports logical volume management
* X display manager, a graphical login manager

### Medicine

* Degenerative myelopathy, a condition in dogs affecting the spinal cord
* Diabetes mellitus, a disease characterized by high blood sugar
* Difference due to memory, a neural activity effect
* Diminished motivation, a condition characterized by lack of motivation
* Double minute, fragments of extrachromosomal DNA in human tumors
* Myotonic dystrophy (DM-1/2/3), a chronic muscle-wasting disease
* n-Decyl β-D-Maltopyranoside, a maltoside detergent used when purifying membrane proteins
* Dermatomyositis, an inflammatory systemic disorder affecting the skin, muscles, and other organs

### Physics

* Dark matter, in cosmology, hypothetical non-luminous matter
* Deformable mirror
* Dispersion measure, the amount of dispersion of radio waves by interstellar medium

### Units of length

* Decimetre (dm), equal to ten centimetres
* Decametre (sometimes Dm), equal to ten metres
* Data mile (DM), in radar, equal to 6000 feet

### Other uses in science, technology and mathematics

* Adamsite, a chemical agent used in riot control
* Differential Manchester encoding
* Distributed morphology, a theoretical framework in linguistics

## Sports and recreation

* Dallas Mavericks, an NBA team
* Danske Mesterskaber, the Danish Athletics Championships
* Defensive midfielder, an association football position
* Divemaster, in scuba diving
* Dungeon monitor, a safety role in BDSM

## Other uses

* De minimis, a Latin legal term
* Diis Manibus, a Latin epitaphial acronym
* SJ Dm3, and Dm, Swedish locomotives
* District magistrate, senior local role in the Indian Administrative Service
* Des Moines, Iowa