A.S.C.O stands for Anonymous Secret Complementing Organization! It currently runs in New Zealand. It is basically a organization that sends kind "letters" to certain pupils in classrooms. All subjects in it are positive, so it isn't considered a nuisance to the general public.
Pinochle is a confused part of A.S.C.O, due to it's recently introduced status, little is known about what relevance it has to with A.S.C.O. It may be the "signature", chosen to disguise the SECRET even more. It may have to do with Blackle A.S.C.O, the account on Wikianswers for A.S.C.O.
Kaleb Oaten did once speak of Pinochle, however the file containing the information is thought to be destroyed or missing. This piece of information has been "unearthed" since a possible clue was found at the end of Blackle A.S.C.O's profile page. See Blackle A.S.C.O
Yay! There is another A.S.C.O note, FOR ME!!!!!!