What does BHDS stand for?

I've noticed that there seems to be an industry standard way of naming travel trailers. I've particularly noticed that I like BHDS trailers. I'v seen that BH means bunk house, but I am unsure what the DS stands for?

Also, if there anywhere that provides a list of all these different "models" and what they mean? It would be a lot easier for me to track down what I want if I knew. :-)

Thanks,
Dave