Alliance Atlantis Communications Inc. (commonly known as Alliance Atlantis and commonly shortened to simply Alliance or Atlantis and formerly traded as TSX:AAC) was a Canadian media company that operated primarily as a specialty service operator in Canada. Alliance Atlantis also had offices in Halifax, Los Angeles, London, Dublin, Madrid, Barcelona, Shannon, and Sydney. Alliance Atlantis was a merger of two companies founded in 1978 as Atlantis Communications and in 1985 as Alliance Communications. Both companies merged in 1998.