- Ames Library of South Asia Maps (388)
- Amos S. Deinard Papers (13)
- Andersen Horticultural Library General Collection (1)
- Annual and Quarterly Reports of YMCA International Work in China (1095)
- Arab American Collection (29)
- Armenian American Collection (16)
- Arthur E. Schneider Papers (13)
- Arthur Kleiner Collection of Silent Movie Music (421)
- Association for Computing Machinery (549)
- Association for Voluntary Sterilization Records (5)
- Athletics Department Photograph Collection (UMD) (4655)
- Baden Street Settlement Records (6)
- Ballet Arts Minnesota Records (7)
- Bat of Minerva (551)
- Beadle's Weekly (156)
- Bedford YMCA Records (4)
- Belarusan American Collection (13)
- Bell Museum of Natural History Negatives (6800)
- Bell Museum of Natural History Records (848)
- Berman Family Papers (7)
