1. (initialism) .  National Applications Office, an agent of the United States Department of Homeland Security.
  2. (initialism) .  National Audit Office in several nations.
  3. (initialism) .  Nautical Almanac Office in several nations.
  4. (initialism) .  North Atlantic oscillation, a climatic phenomenon.

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This entry was last updated on RefTopia from its source on 3/20/2012.