Wiener's early life is well documented in family correspondence, especially with his father, who taught him at home until high school and who remained an important influence on his work. College notebooks, graduate philosophy essays, and Army records are also included. Wiener's correspondence with his professors, including Bertrand Russell, and with his colleagues trace his work in mathematical theory and its interdisciplinary applications. The gradual development of information theory and cybernetics is found in correspondence with Arturo Rosenblueth, John von Neumann, and Warren S. McCulloch. Much of his correspondence on non-scientific matters examines his interest in the world situation before World War II, his efforts to assist European scholars, and his postwar concern that scientists not evade social responsibility. Correspondence with Walter Reuther discusses his fear of possible postwar unemployment.The collection includes extensive files of Wiener's writings, published and unpublished. Copies of articles he wrote while in Cambridge and Germany reflect his transition from philosopher to mathematician. His later writings record his collaborative work with colleagues and students. Included in the collection is the unpublished Dynamics of the Nervous System, by Wiener and Rosenblueth, as well as his other books, lectures, speeches, articles, and book reviews. Copies of writings by others are also included in the collection. Some of the other correspondents prominently represented in the collection include: E. J. Akutowicz, John S. Barlow, Gregory Bateson, Julian Bigelow, L. Boelter, Harald Bohr, Max Born, Mary Agnes Brazier, Jacob Bronowski, Martin Buerger, John Burchard, Vannevar Bush, Eduardo Caianiello, Mary Cartwright, Yuen Ren Chao, K. T. Compton, Groff Conklin, Giorgio De Santillana, Karl Deutsch, Joseph Doob, Albert Einstein, T. S. Eliot, Jason Epstein, Maurice Frechet, Iago Galdston, John Gurland, Jacques Hadamard, J. B. S. Haldane, G. H. Hardy, George Russell Harrison, Piet Hein, A. E. Heins, Carl Heyel, Hudson Hoagland, Temple Rice Hollcroft, Shikao Ikehara, Mark Kac, Horace M. Kallen, James Killian, Henry Kissinger, J. R. Kline, Alfred Korzybski, D. D. Kosambi, Y. W. Lee, S. Lefschetz, Jerome Lettvin, Norman Levinson, Paul Levy, Leon Lichtenstein, Sebastian Littauser, P. C. Mahalanobis, Szolem Mandelbrojt, William Ted Martin, Pesi Masani, Margaret Mead, Henry A. Moe, Robert S. Morison, Barnard Muscio, Jerzy Neyman, Raymond Oaley, V. L. Parsegian, Linus Pauling, Andrew Pikler, Gordon Raisbeck, Alex Rathe, Walter Reuther, Roland Richardson, Walter Rosenblith, Jerome Rothstein, J. P. Schade, Theodore Shedlovsky, Armand Siegel, Marshall Stone, Julius Stratton, Dirk Struik, J. D. Tamarkin, Robert Vallee, Manuel Sandoval Vallarta, Oswald Veblen, William Walter, Warren Weaver, Leo Wiener, Aurel Wintner, Antoni Zygmund.