Office files, reports, research files, and other materials relating to Harwit's work as a professor of astrophysics at Cornell University and his involvement with numerous organizations in his field.

Correspondence files (1964-1987) include Cornell Department of Astronomy correspondence, articles, reports, research proposals, and other materials concerning astronomy, rocketry, astrophysics, telescopes, Hadamard transform spectrometry, infrared spectrometry, research projects, undergraduate and graduate education, and organizations with which Harwit was affiliated, including the Center for Radiophysics and Space Research, the American Physical Society, the National Aeronautics and Space Administration, the Association of Universities for Research in Astronomy, and others. Also, reports, correspondence, proposals, and guidelines pertaining to committees, courses, finances, and activities of the Program in the History and Philosophy of Science and Technology, and other offices with which it was associated, such as the National Science Foundation, the Society for the Humanities, and the Cornell Graduate School and Development Office; correspondence, handouts, and brochures of the Common Learning Program at Cornell; agendas, minutes, and correspondence relating to meetings of the Astrophysics Management Operations Working Group; and correspondence, minutes, reports, a budget, and printed materials concerning the Space and Earth Science Advisory Committee and an agreement between the U.S. and U.S.S.R. regarding outer space exploration.

There is also a large quantity of grant proposals, regulations, reports, student notebooks from M.I.T., diaries, papers by Harwit's students, and printed materials dealing with Harwit's research proposals, including files on the National Science Foundation, NASA, Air Force Cambridge Research Laboratories, Kuiper Airborne Observatory Users' Group, the Shuttle Infrared Telescope Facility, and the Kitt Peak National Observatory. In addition, there are photographs, technical drawings, and oversized blueprints of rockets, telescopes, and other scientific instruments. Includes files on the history and philosophy of the Science and Technology Program, 1984-1986.