D9 Explained
D9, D09, D.IX, D IX, D.9 or D-9 may mean:
- D-IX, a name given to a drug created by Nazi scientists to create soldiers with higher endurance
- D9-brane in string theory
- D-9 (video), a video format also known as Digital-S
- Albatros D.IX, a 1918 German prototype single-seat fighter
- ATC code D09, a section of the Anatomical Therapeutic Chemical Classification System
- Bavarian D IX, a 1888 German steam locomotive model
- Caldwell D9, a model in Polish Mountain Hillclimb
- Caterpillar D9, a 1954 large track-type tractor
- Dewoitine D.9, a French Dewoitine aircraft
- HMS D9, a 1912 British E class submarine
- HMS Imperial (D09), a 1936 British Royal Navy I-class destroyer
- HMS Trumpeter (D09), a 1942 British Royal Navy escort aircraft carrier
- Jodel D9, a 1948 French single-seat ultralight monoplane
- PRR D9, an american PRR 4-4-0 steam locomotive
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