[stacy's stang]

Okay, at the risk of sounding really dumb, I have to ask. What is a Boss Mustang? I've tried researching and it looks like they first made the Boss in '70 or '71. It's gone thru several versions and the last version was a Boss 429? Is that right? What made it different? Supercharger? They don't make them now right? When I got my Boss decals I just thought they looked cool. Now people are asking me about it and I realized I don't really know . Please help!