The Midwest Archives Conference is the nation’s largest regional professional association for archivists. Founded in 1972, MAC now has approximately one thousand individual members. MAC’s 177 institutional members include a variety of corporate, government, religious, and university archives, as well as historical societies and other manuscripts repositories and special collections. The MAC region is the 13 heartland states: Illinois, Indiana, Iowa, Kansas, Kentucky, Michigan, Minnesota, Missouri, Nebraska, North Dakota, South Dakota, Ohio, and Wisconsin. However, MAC has individual and institutional members from over 30 other states and five other nations, and more are always welcome. More information on MAC can be found here: http://www.midwestarchives.org/about-mac