Memo abbr (4)

I think it could be either:

asap

attn

(Other definitions for asap that I've seen before include "yesterday?" , "Notation meaning without delay, fast as you can" , "Notation or acronym meaning without avoidable delay" , "At one's earliest convenience" , "Notation meaning with minimum delay" .)

I've seen this clue in the New York Times, the L.A. Times Daily, the LA Times, The Washington Post, the Wall Street Journal and the Universal.

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