OK, the poster did come back later, I do agree, after reading the arrogant comment, I did a search on CTL and made my reply to his rudeness which he later expanded on explaining with a good definition. When I do d "CTL" search alone, at the point of impact we did not know what it meant, Google is of little help, the expanded version, there is much information, I agree.
As he did correct him self, I will happily Edit my thoughts.
Thanks fro the expanded definition links by the way.