I agree it means something, and for B&S people, it is probably easy to look up in a book. I also think B&S has gone to some trouble to sort the optional features into sets, so it works like car models: popular packages are turned into standard models. The less popular packages that still have to be offered because customers demand them, become option packs. Then the real trivia like what colour the decals are, become part of the "Trim" - the two digits that follow the Type, after the hyphen. The system seems quite rational, but so far it isn't transparent.
