Zimbra Community v. Zimbra Collaboration Server (Community Edition)

Hi Folks,

I have ZCS (Community edition) 8.0.6 running and I'm quite pleased with it. I hear of "Zimbra Community" and I'm lead to believe that this is a different animal than Zimbra Collaboration Server (Community Edition). What a tragically poor evolution of names...

Am I right? ZCS is a subset of Zimbra Community? Can I merge my ZCS server into a Zimbra Community installation? Add Zimbra Community to ZCS? Where can I find some explanation for my confusion?

Thanks for the help,

Chris.