D20, D-20 or d20 may refer to:

Arts, entertainment, and media

* d20, a polyhedral die commonly used in role-playing games * d20 System, a role-playing game system published by Wizards of the Coast * Arriflex D-20, a film-style digital high definition movie camera * D-20, a version of the

Roland D-50 The Roland D-50 is a synthesizer produced by Roland and released in April 1987. Its features include subtractive synthesis, on-board effects, a joystick for data manipulation, and an analogue synthesis-styled layout design. The external Roland P ...

synthesizer * ''

Dimension 20 ''Dimension 20'' is a tabletop role-playing game show produced by CollegeHumor, and generally hosted by Brennan Lee Mulligan as the show's regular Dungeon Master. Most of the games use ''Dungeons & Dragons'' 5th edition. Seasons of the show ...

'', a tabletop role-playing game show made by CollegeHumor *

Queen's Gambit Accepted The Queen's Gambit Accepted (or QGA) is a chess opening characterised by the moves: :1. d4 d5 :2. c4 dxc4 The Queen's Gambit Accepted is the third most popular option on Black's second move, after 2...e6 (the Queen's Gambit Declined) and 2.. ...

, Encyclopaedia of Chess Openings code

Military

152 mm towed gun-howitzer M1955 (D-20) The 152 mm gun-howitzer M1955, also known as the D-20, (russian: 152-мм пушка-гаубица Д-20 обр. 1955 г.) is a manually loaded, towed 152 mm artillery piece, manufactured in the Soviet Union during the 1950s. It was fir ...

, a Soviet artillery piece * , a destroyer that served with the Argentine Navy between 1961 and 1982 * , a destroyer escort that served with the Brazilian Navy between 1944 and 1975 * , a destroyer that served with the Royal Hellenic Navy between 1951 and 1972 * , a Royal Navy guided missile destroyer launched in 1964 and decommissioned in 1987

Science

* D20, a diffractometer located at

Institut Laue–Langevin The Institut Laue–Langevin (ILL) is an internationally financed scientific facility, situated on the Polygone Scientifique in Grenoble, France. It is one of the world centres for research using neutrons. Founded in 1967 and honouring the ph ...

used in neutron research * Heavy water, or deuterium oxide (D₂O or ²H₂O)

Vehicles and transport

* D20 road (Croatia), a state road * Aero Synergie Jodel D20, a French ultralight * Chevrolet D-20, a pick-up truck made in Brazil and Argentina * LNER D20, a class of British steam locomotives *

Senova D20 The Senova D20 is a subcompact sedan and hatchback produced by BAIC under the Senova brand. Originally called the Beijing Auto E-Series when launched in 2012, the subcompact hatchback and sedan was renamed to Senova D20 in 2014 with the launch of ...

, a subcompact car made by SAIC in China * Soloviev D-20, a Soviet turbofan engine

Other

Dublin 20 Dublin postal districts have been used by Ireland's postal service, known as '' An Post'', to sort mail in Dublin. The system is similar to that used in cities in Europe and North America until they adopted national postal code systems in the 1 ...

, a Dublin, Ireland postal district *

2020 Democratic National Convention The 2020 Democratic National Convention was a presidential nominating convention that was held from August 17 to 20, 2020, at the Wisconsin Center in Milwaukee, Wisconsin, and virtually across the United States. At the convention, delegates of ...

, American political convention, branded as "D20" {{Letter-number combination disambiguation