Why is a BMW car also known as a Beemer?

The terms Bimmer, Beemer or Beamer refer to BMW vehicles. However, Bimmer is the correct term for BMW cars while Beemer and Beamer are used for BMW motorcycles. Why all these different terms? BMW started big in motorcycles and was very active in motor sports then. One of its biggest competitors at the racing track was BSA, which was also a big name in motorcycles. Since BSA motorcycles were known as Beesers, BMW fans decided to call BMW motorcycles Beemers. Over time, different people (who couldn’t spell very well and didn’t take the trouble to find out) started to use the term Beamer. BMW went on to design and manufacture cars which subsequently outshone their two-wheeler cousins. The BMW car enthusiasts wanted a new term to differentiate cars from motorcycles and coined the term Bimmer.