ACN

ACN is a three-letter abbreviation with multiple meanings, as described below:

Accenture, which has the stock symbol "ACN".
Achang, which has the ISO/DIS 639-3 code "ACN".
Achnasheen railway station, a United Kingdom railway station with the National Rail code "ACN".
ACN Inc., a direct selling telecommunications company.
Acrylonitrile, a precursor monomer in the manufacture of synthetic polymers.
African Cup of Nations, an international football competition for Confederation of African Football nations.
Allegiance Chat Network, a network of themed chatrooms.
Ante Christum Natum, the Latin equivalent of B.C., seldom used in English.
Architecture for Control Networks, a network protocol for theatrical control.
Armored Core: Nexus, a game published by From Software for the PlayStation 2.
Australian Company Number, a number issued by the Australian Securities and Investments Commission to registered companies.
American Collectibles Network, an American television network now known as Jewelry Television.