D2
- 2D (disambiguation)
- ATC code D02
- Albatros D.II
- Alfa Romeo D2
- Aviatik (Berg) D.II
- Bavarian D II
- Bavarian D II (Ostbahn)
- Bavarian D II (old)
- Char D2
- Cheung Sha Wan
- Codex Claromontanus
- Cowon D2
- Cyclin D2
- D (SEPTA Metro)
- D-2 (mixtape)
- D-2 (video)
- D-Boys
- D2 (hotel chain)
- D2 (magazine)
- D2 (video game)
- D2 Mannesmann
- D2 Subway
- D2 motorway (Czech Republic)
- D2 motorway (Slovakia)
- D2 road (Croatia)
- DII (disambiguation)
- DIO2
- DOCSIS
- DOCSIS 2
- Daimler D.II
- Damania Airways
- Datasaab D2
- Delta D2
- Destiny 2
- Dhoom 2
- Diablo II
- Dice
- Division II (disambiguation)
- Dopamine receptor D2
- Double Dragon (hacking group)
- Dublin 2
- Dunne D.2
- D² (Dexter's Laboratory)
- Euler D.II
- Fokker D.II
- GNR Class D2
- Great Southern and Western Railway
- HMS Attacker (D02)
- HMS Devonshire (D02)
- HMS Inglefield (D02)
- Halberstadt D.II
- Hughes D-2
- ICD-10
- LFG Roland D.II
- LaCie
- Lai Chi Kok station
- Levuglandin D2
- MEK6800D2
- MTR
- Marcelo D2
- Mercedes D.II
- Moscow Central Diameters
- Mount Dulang-dulang
- Neptune
- PRR D2
- Phönix D.II
- Prostaglandin D2 receptor
- R2-D2
- Resolvin D2
- STS-55
- Schütte-Lanz D.II
- Zhidou D2