This collection includes issues of two Tau Beta Pi Publications, The Bent (1907-1985) and The Council Bulletin (1925-1985). Other highlights include the files of two past Tau Beta Pi presidents, H. M. King and P. W. Ott, as well as the historical financial records of Tau Beta Pi. Membership and chapter records of the Sigma Tau Engineering Fraternity, with whom Tau Beta Pi merged in 1974, are also included in this collection.