Question: what does zf stand for?
Answer: ZF Friedrichshafen AG, also known as ZF Group, originally Zahnradfabrik Friedrichshafen, and commonly abbreviated to ZF (ZF = "Zahnradfabrik" = "Gear Factory"), is a German car parts maker headquartered in Friedrichshafen, in the south-west German state of Baden-Württemberg.