RSA Certificate Owner and Issuer line meanings?
CN is common name, OU is orginizational unit, O = organization.

So we could have CN="John Johnson", OU="Sales", O="Acme Corp." or something like that.

http://docs.oracle.com/javase/1.4.2/docs/tooldocs/windows/keytool.html only mentions these, but I've seen Email as well.