Comprises:
- B1, Copy of cables from Ferranti to E. Grundy, Ferranti, October 1948, asking for preliminary report on digital computing;
- B2, Copy of letter, 1 November 1948, from J.D. Carter re. F.W. Williams' lectures on electronic computer;
- B3, Copy of letter of B. Lockspeiser to E. Grundy, 26 October 1948, giving Ferranti authority to construct an electronic calculating machine to the instructions of Professor F.C. Williams;
- B4, Ferranti circular, 23 December 1948, re. arrangements for proceeding with the Williams' machine;
- B5, Copy of memo. signed by S. Gill, 9 May 1957, re. order code for future scientific computer.