Comprises:
- 1, Computers, Siemens Brothers, Vol II, correspondence, 1959-1961;
- 2, Computers, Siemens Brothers, Vol III, correspondence, 1962-1963;
- 3, Computer Equipment (High Speed Printers), Solartron Ltd Patent Search, correspondence and reports, 1960;
- 4, Computer Equipment, Solartron Electronic Business Machines, Development Proposalscorrespondence and reports,
- 5, Computer Equipment, Solartron, Development Proposals, technical reports, 1959;
- 6, Computers, Leo Computers Ltd (J Lyons Ltd), correspondence, 1955-1958;
- 7, Computers, J Lyons Ltd, Components, correspondence, 1955-1964;
- 8, Computers, Ultra Electric Ltd, Advisory Service, correspondence, 1959;
- 9, Computers, EPA Mission to USA, correspondence, 1959-1960.