Collection
- Anna Hoyt Memorandum Book, circa 1864-19501
- Anonymous Ann Arbor, Michigan photograph collection, circa 1890-18991
- Anonymous Gettysburg campaign reminiscence, 1890s1
- Argus-Press records, 1862-2016 (majority within 1960-1990)1
- Arnold Transit Company records, 1854-1987 (majority within 1900-1970)1
- Arnold-Safford family papers, 1856-19921
- Arthur Brown family papers, circa 1873-19451
- Arthur H. Vandenberg papers, 1884-1974 (majority within 1915-1951)1
- Arthur Ingraham Martindale collection, 1852-2013 (majority within 1861-1880)1
- Arthur J. Lacy Papers, 1891-19751
- Arthur J. Tuttle Papers, 1849-1958 (majority within 1888-1944)1
- Arthur Lyon Cross Papers, 1897-19401
- Arthur Robertson Cushny photograph collection, circa 1890-19201
- Arthur W. Haydon diaries, 1865-1879, 1888-19151
- Arthur Whitmore Smith papers, 1893-1954 (majority within 1930-1954)1
- Athletic Department (University of Michigan) Individual Files, circa 1880s-2013 (majority within 1940-2008)1
- Athletic Department (University of Michigan) records, 1860-20171
- Atwell-Hicks Map Collection, circa 1838-19021
- Austin Blair Family Papers, 1849-1981 (majority within 1895-1920)1
- Austin W. Curtis Papers, 1896-19711