E.M.I. duplicated memoranda on Fast Computer and the development of the Emidec 3400, February, April, November (2) 1959; undated table of comparison of the Emidec 2400 with the I.B.M. 7070.

Strachey's notes and calculations, mainly on administrative and financial matters, staffing for the 1100, 2400, 3400, etc.

E.M.I. duplicated memoranda, progress reports, etc. on the 3400, including 'Proposals for the development of a new high speed computer', May 1960, and Progress reports May, June, August, September, October 1960.

Strachey's manuscript notes and drafts on 'Dynamics' and 'Geodesics'.

E.M.I. duplicated memoranda, reports, specifications, tests, etc. on the 3400 project, and a 'Note on Nebula'.

Strachey's folder of notes, calculations, routines and circuits.

Copy of a letter from Strachey to P.M.S. Blackett on 'the mathematical successor of the Emidec 2400', written from the National Research Development Corporation (N.R.D.C.).

Copy of an E.M.I. memorandum on ATHENE, heavily and unfavourably commented upon by Strachey.

Tagged folder of specifications, layout and diagrams of the Elliott 502. Mainly official specifications, codes and routines supplied by the firm, some annotated by Strachey, with notes of meetings. Strachey advised the firm on the Order Code for the Elliott 502 Computer.

Minutes and notes of meetings, with papers and reports on various aspects of the micro-instruction code for the 502, some annotated by Strachey; brief correspondence regarding meetings is sometimes included from Roger L. Cook (Technical Services Manager, Computer Centre, Elliott Brothers). The material relates to meetings on 6, 20 January, 10, 17, 24, 29 February 1960. Strachey advised the firm on the Order Code for the Elliott 502 Computer.

Minutes and notes of meetings, with papers and reports on various aspects of the micro-instruction code for the 502, some annotated by Strachey. The material relates to meetings on 9, 27 March, 1, 7 April, n.d., 9, 13 May 1960. Strachey advised the firm on the Order Code for the Elliott 502 Computer.

Strachey's notes and calculations for the Elliott 502 Micro Order Structure. Strachey advised the firm on the Order Code for the Elliott 502 Computer.

'Bull Code'. Notes and routines with this name for the Elliott 502 Computer. Strachey advised the firm on the Order Code for the Elliott 502 Computer.

Brief manuscript notes by Strachey on the English Electric DEUCE Computer Manual, 1956. Brief correspondence 1961.

Manuscript plan and draft of a report on a statistical analyser, and final typescript version.

Miscellaneous manuscript notes, diagrams and calculations for a statistical analyser.