Copies of some articles are held elsewhere in the collection. Includes correspondence with Bernard Taylor, Editor of the Long Range Planning Journal, Pergamon Press, 1968; William J. Rolph, Associate Editor of Automation, 1969; A. N. Kemmer, Editor of Eureka, 1970; Harry D. Husley, Editor of the IEEE Transactions on Electronic Computers, 1970; Richard G. Mills, First National City Bank, 1970; S. S. Husson, IBM, 1970; Peter Hammersley, Editor of the Computer Journal, 1972; Richard A. Rink, McMaster University, 1972; Brian Randell, University of Newcastle upon Tyne, 1972; representatives of Springer-Verlag, 1972; William S. Dorn and Elliott I. Organick, Editors of Computing Surveys, 1972; Anthony Ralston, Editor of the Encyclopedia of Computer Science, 1972-4; Harry Whitfield, University of Edinburgh, 1972; I. Potter, Project Trenchard, Salisbury Barracks, 1972; Earl E. Swartzlander Jr, Editor of Computer Design: historical papers, 1972; Nicholas Zvegintzov, Rupert WV, 1973; Peter J. Denning, Purdue University, 1973; G. A. Butlin, University of Leicester, 1973; D. Davies, Editor of Nature, 1975; Philip B. Jordain, Editor of Condensed Computer Encyclopedia), 1975; J. C. Hipwell, Editor of Computer Weekly, 1976; J. C. Cooper, Managing Editor, and M. D. Bayman, Features Editor of Electronics and Power, 1979; Robert L. Gordon, Prime Computers, 1979; True Seaborn, Editor of Computer Magazine, 1979-80; William M. Waite, Editor of Operating Systems Review, 1979-80; Brian Randell, Annals of the History of Computing, 1980; Yoshio Nishimura, Editor of Nikkei Electronics, 1980. Drafts/proofs of papers 'Slave memories and segmentation', 'Notes on the status of MULTICS in October 1970', 'A study of data-organisation for a general-purpose programming language', 'The EDSAC', 'Ultrasonic memory', 'Early Digital Computers from Harvard Mark I to the UNIVAC' and 'Charles Babbage', 'Differential Analyser' (the last five for the Encyclopedia of Computer Science), 'Time-sharing' (for Condensed Computer Encyclopedia), 'A new hardware capability architecture' (for Operating Systems Review), obituary notice for John W. Mauchly (for Nature).