So sorry to ruffle your feathers
Sreenivasa, my apologies I did not mean to imply you did not know the difference between the two.
However, there has been confusion of difference in AOS and COS is in other threads. This is AOS (I-485) forum so I wanted to post so other readers realize that CSC is not talking about processing AOS cases in less than 30 days. You may know everything but others, including me, do not. Was just trying to head off any confusion others may have reading your posting.