D20

D20, D-20 or d20 may refer to:

• D20 road (Croatia), a state road
• d20 System, a system for role-playing games
• Arriflex D-20, a film-style digital high definition movie camera
• Chevrolet D-20, a pick-up truck made in Brazil and Argentina
• 152 mm towed gun-howitzer M1955 (D-20), a Soviet artillery piece
• Dublin 20, a Dublin, Ireland postal district
• Heavy water, or deuterium oxide (D₂O or ²H₂O)
• D20, a diffractometer located at Institut Laue–Langevin used in neutron research
• d20, a twenty-sided polyhedral die
• D-20, a version of the Roland D-50 synthesizer

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