Comprises:
- 1, High Speed Computers, Ferranti, Atlas Project Contract, 1959-1962;
- 2, High Speed Computers, Ferranti, Atlas Project Contract, Vol 2, 1963;
- 3, Computers, NRDC Subcommittee, Correspondence Vol 1, 1952-1954;
- 4, Computers, NRDC Subcommittee, Correspondence, Vol 2, 1955-1958;
- 5, Computers, NRDC Subcommittee, Correspondence Vol 3, 1958-1967.