Sd.Kfz.

Sonderkraftfahrzeug (abbreviated Sd.Kfz.,German for "special purpose vehicle" or "special ordnance vehicle") was the ordnance inventory designation used by Nazi Germany during World War II for military vehicles; for example Sd.Kfz. 101 for the Panzer I.

Sd.Kfz. numbers were assigned to armored, tracked, and half-tracked vehicles in military service with Nazi Germany prior to and during World War II.

There were no strict rules regarding number series. For example, the Pz Kpfw II Ausf. L was designed and named as a reconnaissance vehicle, yet was placed in the 100-series rather than the 200-series. Overall, the vehicles were placed in these categories:

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