Various organizations define the Midwest with slightly different groups of states. For example, the Council of State Governments, an organization for communication and coordination among state governments, includes in its Midwest regional office eleven states from the above list, omitting Missouri, which is in the CSG South region. The Midwest Region of the National Park Service consists of these twelve states plus the state of Arkansas. The Midwest Archives Conference, a professional archives organization, with hundreds of archivists, curators, and information professionals as members, covers the above twelve states plus Kentucky.