Comprises:
- 1, Electronic Computers, Armco Corporation, Trials (permalloy), correspondence, 1952-1954;
- 2, Digital Write-Out System, MRC Assignment, correspondence;
- 3, Single Wire Multi-Track Magnetic Head, The Northern Polytechnic, Assignment, assignment and correspondence, 1959;
- 4, Electronic Computers, Telecomputing Corporation, Related Projects, correspondence and report, 1952;
- 5, Computers, A D Little Inc, Research for Development, correspondence, 1952;
- 6, Computers, Magnetic Tape Transport, Decca Radar Ltd, General, correspondence and reports, 1960-1961;
- 7, File of Decca Radar Technical Reports, 1960;
- 8, Computers, Related Projects, Institut fur Praktische Mathematik (Darmstadt), correspondence, 1953;
- 9, Computers, Technical Matters, Johns Hopkins University, correspondence and report, 1953;
- 10, Computers, EMI Institutes, Education/Training Courses, correspondence, 1956;
- 11, Computers, Siemens Brothers, correspondence, 1955-1958.