These wide-ranging files begin with several folders on Hackman's activities, presentations, and writings on oral history for the Oral History Association, leading up to his participation in the SAA’s Oral History Committee during 1972-1973. There are also folders on several SAA Annual Meetings: by 1975 he was a member of the SAA’s annual meeting program committee, the first of four he served on. In addition, there are folders on his presentations at several SAA workshops, on other sessions or meetings he chaired or arranged or presented, on his participation in several SAA committees and professional affiliation groups, and a variety of other activities.

There is also material on the SAA 1986 China Tour, during which he was one of the several members of the delegation who often made presentations to Chinese archives groups; files when he was nominated as a candidate for SAA Council and then SAA President. Lastly, in this box are his files as chair of the Program Committee for the May 1980 MARAC meeting in Washington, and files from presentations he made for SAA and other organizations on fund-raising and legislative advocacy.