D series
# D series

D series may refer to:

## Devices

* SM-65D Atlas "Atlas D" ICBM
* Nikon digital single lens reflex cameras

## Media

* QI (D series), the fourth series of the BBC TV quiz show QI

## Vehicles

* Allis-Chalmers D Series, tractors
* Bedford D series, trucks
* Chevrolet Series D, trucks
* Dodge D series, pickup trucks
* Ford D series, trucks
* Group D Production Sports Cars, CAMS class of race car
* Honda D engine
* International Harvester light & medium duty trucks of the D Series - 1930s and International Harvester Light Line pickup, 1969–1975
* MCI D-Series motorcoaches built by Motor Coach Industries (MCI)
* SJ D, locomotives used by Statens Järnvägar (SJ) of Sweden
* Volkswagen Group D platform, Audi, Bentley, and Volkswagen chassis configuration
* D-series trains, the designation for high-speed long-distance trains in China less fast than the G-series (see Passenger rail transport in China#Classes)

## Other

* Tool steel D series, high carbon-chromium
