Files vs Salesforce CRM Content vs Salesforce Knowledge vs Documents vs Attachments

With the introduction of chatter came the files tab.  Adding to the number of different areas you can upload files to in sfdc.  Here's a very helpful chart for the differences between Files, Salesforce CRM Content, Salesforce Knowledge, Documents, and Attachments -http://t.co/pMpqgnlQ .  Thanks @MikeGerholdt