ACS

• Action Code Script[?] (Hexen game)
• Administrative command system[?]
• Advanced Camera for Surveys[?] (Hubble Space Telescope)
• Agency Computer Systems[?] Inc.
• Alaska Communications Systems[?]
• American Camellia Society[?]
• American Canal Society[?]
• American Cancer Society[?]
• American Cannabis Society[?]
• American Carbon Society[?]
• American Carousel Society[?]
• American Ceramic Society[?]
• American Cetacean Society[?]
• American Cheese Society[?]
• American Chemical Society[?] (acs.org (http://www.acs.org/))
• American Clematis Society[?]
• American Cockatiel Society[?]
• American College of Sofia[?] (acs.bg (http://www.acs.bg/))
• American College of Surgeons[?]
• American Colonization Society
• American Community Schools of Athens[?] (acs.gr (http://www.acs.gr/))
• American Community Schools, England[?]
• American Community Survey[?] (US Census)
• American Conifer Society[?]
• American Constitution Society[?]
• American Cryonics Society[?]
• Army Community Service[?] (US)
• Associated Colleges of the South[?] (US)
• Association for Canadian Studies[?]
• Association of Caribbean States[?]
• Australian Cinematographers Society[?]
• Australian Computer Society[?] (acs.org.au (http://www.acs.org.au/))
• Australian Correspondence Schools[?] (acs.edu.au (http://www.acs.edu.au/))
• Australian Customs Service[?]
• Automobil Club der Schweiz[?] (acs.ch (http://www.acs.ch/))
• Auxiliary Crane Ship[?] (US Navy hull classification symbol)

ACS is the stock symbol for Affiliated Computer Services[?] Inc.