The Allan Kaprow Papers offer comprehensive documentation of an artistic career, including the complete extant documentation of Kaprow's Environments, Happenings, and Activities. Hundreds of reproductions from the Kaprow archive were published in Allan Kaprow—Art as Life (2008).

Selections from the David Tudor Papers document the composer and pianist's participation in post–World War II experimental and avant-garde music. Collaborators include John Cage, Earle Brown, Morton Feldman, Christian Wolff, Sylvano Bussotti, and Karlheinz Stockhausen.

Panel discussions, interviews, letters to curators, and other informal writings (including drafts and corrections), as well as audio recordings and transcripts of a 1969 interview with Arthur Cohen.