ACS (originally "ALMA Common Software") is a control framework that provides general purpose distributed system functionality. It was developed starting in early 2000s for the Atacama Large Millimeter/Sub-millimeter Array (ALMA) radio astronomy observatory. It has also been released under the GNU Lesser General Public License (LGPL), allowing other projects to use it and people from other multiple institutions to collaborate in and contribute to its development. This repository maintains the open-source version for the broader ACS Community. The community wiki provides relevant documentation and references to shared resources, while this page defines the general organization of the community.