Maple is the general name for it..
see when it comes to HTC and carriers its like an umbrella corporation so to speak for all of them.
u have HTC sitting on top, with there given name : Maple
then would come the carrier names ex : Verizon's Ozone, Sprint's Snap, and T-Mobile's Dash 3G, is this making sense??
everything else is just the guts of the device..which as well is carrier specific, because all carriers work on diff networks read from diff satellites.
hopefully this somewhat explains the way it works.