The papers of John Evans, 1957-2012, bulk 1970s-2000, measure 7.1 linear feet and 1.00 GB and document the collage artist's involvement with mail art. The vast majority of letters are from mail artists, often with embellished envelopes and include and a digital version of Collected Essays by John Held, Jr. Writings include a thesis about mail art by Marya Trianfellos. Subject files concern art stamps, mail art shows and events, Ray Johnson's death and memorial tributes to him. The most thoroughly documented mail art project, "John Evans Fake Collages," is of unknown origin. In addition, there are a few items relating to projects conceived by Evans and more substantial documentation of projects initiated by Christina Behmenburg, Leslie Caldera, Ryosuke Cohen, Peter W. Kaufmann, Angela and Peter Netmail.

The papers of rubberstamp and artistamp artist, performance artist, collector of mail art, and fine arts librarian John Held, Jr. date from 1947-2018, bulk 1973-2013, and measure 12.9 linear feet. Found within the papers are biographical material, 18 printed diaries, letters received by Held from mail artists around the world, art work consisting of artistamps designed by miscellaneous mail artists, interview transcripts, writings, project and event files, printed material, mail art sent for the Gutai Historical Survey Exhibition held at the San Francisco Art Institute in 2013, and a collection of biographical material presented by Held at a Mail Art Study Day held at the Archives of American Art in 2018.

Ella Fitzgerald, often called the "First Lady of Song," was one of the 20th century's most important musical performers. The collection reflects her career and personal life through photographs, audio recordings, and manuscript materials.

The collection documents Gabler's involvement in the recording industry and the evolution of Commodore Records. The documentation begins with the Commodore Radio Shop through its evolution to Commodore Music Shop. The collection also includes the beginnings of the Commodore record label and information detailing Gabler's 30 years as staff producer and later Vice-President in Charge of Artists and Repertoire at Decca Records (1941-1974). There is a small collection of black and white photographs chronicling the early years at the Commodore Music Shop, as well as jam sessions, often held at Jimmy Ryan's on 52nd Street. The collection also includes a vast array of audio recordings (mainly audiodiscs).

The records of the Richard York Gallery, a New York gallery specializing in American art from early 1800s to 1950, measure 79.3 linear feet and date from circa 1865-2005, with the bulk of the material dating from 1981 to 2004. Three-fourths of the records are artists' artwork files, documenting the sale and consignment of nearly 6,500 works of art. The gallery's activities are also recorded through correspondence, client files, gallery invoices, inventories, business and financial records, printed materials, scrapbooks, photographic materials of artwork, and estate records for the John Marin estate and Sergio Stella estate (Joseph Stella). An addition of 10.2 linear feet, dated circa 1865 to 2005, includes artists' files arranged alphabetically containing printed material, clippings, exhibition announcements, and scattered correspondence and financial documents.

The collection documents Duke Ellington's career primarily through orchestrations (scores and parts), music manuscripts, lead sheets, transcriptions, and sheet music. It also includes concert posters, concert programs, television, radio, motion picture and musical theater scripts, business records, correspondence, awards, as well as audiotapes, audiodiscs, photographs, tour itineraries, newspaper clippings, magazines, caricatures, paintings, and scrapbooks.

The John Alexander Pope papers contain limited biographical, personal and professional information. The bulk of the collection consists of published and unpublished writings, research materials and correspondence.

The collection consists of correspondence, appointment books, business records, music manuscripts, sound recordings, photographs, and ephemera documenting the activities of Duke Ellington and the management of Tempo Music, Incorporated. There is a small amount of material relating to the Ellingotn family.

The Technical Reference Files comprise an artificial collection that currently contains 1,900 cubic feet of aviation and space related materials, organized in 22 subject series. File materials include photographs, press releases, clippings, correspondence, reports, and brochures, on individuals, organizations, events, and objects.