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 Washington Post, the LA Times, the L.A. Times Daily, the Wall Street Journal, The New York Times and the Universal.

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