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Includes MS calculations showing the possibility of receiving radar echoes from the Moon, 1942; paper on 'Passive reflectors', 17 Nov. 1943; 'Note on scattering power of aircraft', 1942; letter to Sir Edward Appleton, 16 May 1945. With mounted photograph of the Lys Helig, a launch used for radar experiments at Llandudno, n.d.

Including driving licences, wartime certificates, address labels and a copy letter to Geoffrey Gordon, McGill University (1962).

Includes copies of a speech made at the jubilee dinner of the CU Computer Laboratory, 1987; 'A view of RISC', 1987; 'Loosely coupled systems of physically contiguous computers', 1987; 'An evaluation of the CRISP microprocessor', 1986; 'Processor development Anno 1987'; keynote address at the Human Interface and Human Factors symposium, 1985; 'A research oriented view of the computer industry', 1986; 'Simulated shared memory', 1986; 'The technological background to strategic planning', 1982; 'What can be done to improve programming efficiency?', 1985; 'Physical models and physical reality', 1985; 'A lecture on security', 1982; 'Capabilities and programming languages', no date; 'A user-server distributed computing system', 1978; 'Microprogramming: what remains but the name?', n.d.; 'What is meant by long-range research?', n.d.; 'Lecture notes on LISP'; 'Revised specification for the multi-chip programmable calculator', with a letter to Clive Sinclair, 1974.

A version of the paper appeared in SIGPLAN Notices.

Diaries for trips to Germany US Occupied Zone, 1945; the USA, 1946; Germany UK and US Zones, 1948; Norway, 1948; the Netherlands, 1949; America, 1950; France and Switzerland, 1951; the Netherlands and Belgium, 1951; the USA, 1951; Canada and the USA, 1952; Scotland on holiday, 1955; America, 1956; Australia, 1957; India, 1977; the USA, 1978. .

Visits to Johns Hopkins University, Boston (Spring Joint Computer Conference, Extensible Languages Symposium, May), Poughkeepsie (IBM Large Systems Division) and Cambridge MA (Project MAC). Copies of UN General Assembly Resolution on international cooperation with a view to the use of computers and computation techniques for development, 1968, a presentation 'Straightening out programming languages', byR. W. Bemer, General Electric Company, May 1969, and synopses of Johns Hopkins' newly introduced Computer Science courses. Correspondence with Martin Greenberger, Johns Hopkins University; Robert H. Fano, MIT; Jim Greenwood, IBM; J. C. Licklider, MIT; Anthony G. Oettinger, Harvard; W. M. Waite, University of Colorado; Yaohan Chu, University of Maryland; S. Dorn, University of Denver.