LMS' and CMS'

Is there a difference between Learning Management Systems(LMS) and Course Management Systems(CMS)???
If there is, I'd be the first to say I am guilty of using the two interchangeably. I had to look into them when someone asked me about the best LMS in the market and the best CMS in the market. After I gave my best "finally a chance to show off my one semester of graduate school" smile...I started rambling on in confusion, starting off with "they are the same thing"...my friend was not convinced by my weak explanation and to tell the truth, I wasn't either. At that point, I made a mental note to really understand what both systems are and their differences(if any).
During my research, I got even more confused as the many sources on google also implied that both systems are one and the same. Here are some interesting findings-

• LMS capture what CMS do and more, they have the ability to track the entire learning/teaching process of a particular course or learning episode. They can include performance management systems. The short of it is they deliver, track and manage learning and are suitable for corporate settings.
• CMS support academic learning and LMS support corporate training (This paper made some sense to me) Its a paper by Saul Carliner-Course Management Systems vs Learning Management Systems.
  

My confusion escalated when I went to Moodle.org and they introduced it as "a Course Management System (CMS), also known as a Learning Management System (LMS) or a Virtual Learning Environment (VLE)"...Yikes!!!! I turn back to google and head straight to wikipedia and they agree that these two systems are different(phew); but wikipedia also confused me further by somehow inferring that a course management system is a content management system(this one is for another day) and then calling one of their identified content management systems, a learning management system.(content management system e.g WebCT, as a system focused on development, management and publishing of the content that will typically be delivered via an LMS and further down they identified WebCT as an LMS). At this point, I'm thinking(in lame man) CMS is the child per say, it is an environment within the LMS. Arggh, I'm back to square one.
At this point in time, I would appreciate any reputable source that explains the difference between LMS and CMS'(both course and content). I will continue to look into it, hopefully I can come back and give a better definition, with their differences or similarities.

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