Much of the material deals with the laboratory's later needs for computer hard or software.

Folder D.6. MRC Conferences on computer needs and access to computing facilities for staff of MRC Units, 1958, 1962.

Folder D.7. General correspondence, memoranda, estimates, notes of discussions, meetings and committees, in MRC laboratory and Cambridge University, with computer firms, colleagues and MRC officials, covering all aspects of computer policy and requirements, purchase, hire or collaborative use of machines, 1961-1969.

Includes memoranda and notes from other members of laboratory, in particular D.M. Blow, U.W. Arndt, and also information and reports received from colleagues working elsewhere.

Folder D.8. Correspondence, memoranda, discussion notes etc. on Cambridge University Titan machine, 1963-1969.

Folder D.9. Correspondence, memoranda, notes of meetings and discussions, 1963-1966, on purchase by MRC of Ferranti Argus 304 Computer to process data from X-ray diffractometer, at a cost of £140,000. Includes a copy of a letter by Perutz November 1966 complaining of the poor performance of the machine.

Folder D.10. Correspondence and papers on use of computer time at Atlas Computer Laboratory, 1963-1967.

Folder D.11. Correspondence, memoranda, discussion notes, costings etc., 1959-1966, On purchase of Hilger & Watts/Ferranti diffractometer apparatus. Includes a copy of a complaint by Perutz on the poor performance of Ferranti apparatus.

Folder D.12. Miscellaneous correspondence on Polaroid rapid processing camera for slide making, 1957-1961.