ACSI may also refer to:
Acta Chimica Slovenica, a peer-reviewed chemical journal published by the Slovenian Chemical Society American Customer Satisfaction Index, an economic indicator that measures the satisfaction of consumers in the U.S. Anglo-Chinese School (Independent) Associate of the Chartered Institute for Securities & Investment (ACSI) Association of Christian Schools International Audax Club Sportivo Italiano Advanced Cyclotron Systems Inc, a supplier of medical cyclotrons Abstract communication service interface, a part of IEC 61850 Standard