Burks, Arthur W., Electronic Computing Circuits of the ENIAC, Proceedings of the Institute of Radio Engineers, vol. 35, no. 8, Aug. 1947, pp. 756-767.
Clippinger, R. F., A Logical Coding System Applied to the Eniac, B. R. L. Report No. 673, Aberdeen, Md.: Ballistic Research Laboratories, Sept. 29, 1948, 41 pp.
Eckert, J. Presper, Jr., John W. Mauchly, Herman H. Goldstine, and J. G. Brainerd, Description of the ENIAC and Comments on Electronic Digital Computing Machines, Applied Mathematics Panel Report 171.2R, Washington, D. C.: National Defense Research Committee, Nov. 1945, 78 pp.
Goldstine, Herman H., and Adele Goldstine, The Electronic Numerical Integrator and Computer (ENIAC), Mathematical Tables and Other Aids to Computation, vol. 2, no. 15, July 1946, pp. 97-110.
Hartree, D. R., The ENIAC, an Electronic Computing Machine, Nature, vol. 158, Oct. 12, 1946, pp. 500-506.
Hartree, D. R., Calculating Machines: Recent and Prospective Developments and Their Impact on Mathematical Physics, Cambridge, England: The University Press, 1947, 40 pp. (Pages 14 to 27 are devoted to the Eniac.)
Tabor, Lewis P., Brief Description and Operating Characteristics of the ENIAC, Proceedings of a Symposium on Large-Scale Digital Calculating Machinery, Harvard University Press, 1948, pp. 31-39.
Some of the less technical articles on Eniac are:
Rose, A., Lightning Strikes Mathematics: ENIAC, Popular Science, vol. 148, Apr. 1946, pp. 83-86.
Anonymous, Robot Calculator: ENIAC, All Electronic Device, Business Week, Feb. 16, 1946, p. 50 ...