Files of historical material (photocopies and typescripts) on ICL, including:
- The Hollerith Machines, 1914;
- A. Thomas, Punching and Sorting Machinery, 1930;
- Hollerith Handbook and preliminary Report on new Products, 1938;
- List of Punched Card Machines, 1939;
- Modern Applications of Powers, 1947;
- Powers Samas Accounting Machines: Thirty Years' Progress, 1948;
- F.G. English, The Measure of Progress, Powers Samas Gazette (1952);
- Typescript history of Powers Samas Accounting Machines Ltd., n.d., pp.36, but a few pages missing (copied from original in Vickers Archive, Cambridge University Library, Doc. 771;
- Powers Samas: History of the Company, 1954;
- Hollerith Cavalcade': Fifty Years of Company History, 1957;
- The Beginnings: Reminiscences of C.A. Everard Greene. First Executive of the Tabulator Limited and later General Manager and Director of the British Tabulating Machine Company Ltd, 1958;
- International Computers and Tabulators Limited, c 1964;
- Some Notes on ICL History and Organisation Structure, c 1968;
- International Computers Ltd, 1970;
- ICL Origins and Background, 1973;
- International Computers Limited Research and Advanced Development, 1975;
- ICL's Relations with Government, 1975;
- 70 Years On, 1979;
- John Tysoe and Patrick Hickey, ICL and the Computer Industry, 1979.