here was all kinds of “stuff” going on with Buses through the years. Lots of models, features, options, accessories, etc. The most loaded model with standard options was the ambulance. Something that was standard on one model, could be optional on another – same with accessories. Standard features just came with the Bus, while an option had to be ordered. An accessory was installed after the vehicle was delivered to the dealership, and was usually something that was bought by the Bus
