HARVARD IBM AUTOMATIC
SEQUENCE-CONTROLLED CALCULATOR
The basic scientific description of this machine as of September 1, 1945, is contained in:
Aiken, Howard H., and Staff of the Computation Laboratory, A Manual of Operation for the Automatic Sequence-Controlled Calculator, Cambridge, Mass.: Harvard University Press, 1946, 561 pp.
The machine has changed rather a good deal since Sept. 1, 1945. Some circuits have been removed. Other circuits have been added. The capacity of the machine to do problems has been greatly increased. The Computation Laboratory at Harvard University is cordial towards scientific inquiries, and some unpublished, mimeographed information is available at the laboratory regarding the details of these changes.
Some shorter scientific and technical descriptions of the machine are contained in:
Aiken, Howard H., and Grace M. Hopper, The Automatic Sequence Controlled Calculator (3 parts), Electrical Engineering, vol. 65, nos. 8, 9, and 10, Aug. to Nov. 1946, p. 384 ... (21 pp.).
Bloch, Richard M., Mark I Calculator, Proceedings of a Symposium on Large-Scale Digital Calculating Machinery, Harvard University Press, 1948, pp. 23-30.
Harrison, Joseph O., Jr., The Preparation of Problems for the Mark I Calculator, Proceedings of a Symposium on Large-Scale Digital Calculating Machinery, Harvard University Press, 1948, pp. 208-210.
International Business Machines Corporation, IBM Automatic Sequence-Controlled Calculator, Endicott, N. Y.: International Business Machines Corporation, 1945, 6 pp.
Some of the less technical articles regarding the machine are: