Papers relating to Adrian Liddell Hart's life and career, and to the life and work of his father, Capt Sir Basil Henry Liddell Hart, 1926-1991, including typescript extracts from the diaries of Capt Basil Henry Liddell Hart, 1926-1944; Adrian Liddell Hart's letters to his father, 1930-1969; newspaper cuttings relating to Capt Basil Henry Liddell Hart, 1939-1950; correspondence with John Frederick Lehmann, 1940-1986; typescript articles by Adrian Liddell Hart, 1945-1972, notably 'Reflections on the General Election before the announcement of the result', 1945, 'The Free University of Berlin', Feb 1949, 'The Foreign Legion', Jan 1952, and 'Rehabilitation of drug offenders', Jun 1968; correspondence with MPs and Peers, 1946-1991, including Rt Hon Arthur Leslie Noel Douglas Houghton, Baron Houghton of Sowerby, 1958-1991, Rt Hon (John) Enoch Powell, 1973-1991, Sir (John) Anthony Kershaw, 1960-1986, Rt Hon Francis Aungier Pakenham, 7th Earl Longford, 1985-1991; typescript notes by Adrian Liddell Hart relating to recollections of his father, 1970-1982; correspondence with academics, 1973-1991, including Professor Sir Michael (Eliot) Howard, 1973-1990, Professor Brian (James) Bond, 1974-1991, Professor Robert John O'Neill, 1988-1991; correspondence with authors and journalists, 1978-1991; correspondence with the Foreign Legion Association of Great Britain, 1981-1991; typescript text of lecture by Adrian Liddell Hart entitled 'The British way in warfare', given to students of the Department of War Studies, King's College London, 11 Feb 1982; typescript copies of Adrian Liddell Hart's letters to the press and to magazines, 1983-1991; correspondence relating to Adrian Liddell Hart's research on correspondents of Capt Sir Basil Henry Liddell Hart, 1985-1991; correspondence with the HMS JAMAICA Association and the Flower Class Corvette Association, 1986-1991; papers relating to a proposed book by Adrian Liddell Hart on penology, 1988-1991; book reviews of Liddell Hart and the weight of history by John J Mearsheimer (Cornell University Press, Ithaca, New York, USA, 1988), with typescript review by Adrian Liddell Hart, 25 Feb 1989; correspondence with the T E Lawrence Society, 1990-1991.

Correspondence, reports, agendas and minutes of the International Standards Organisation (ISO), 1977-1997, mainly on information processing systems and programming languages; correspondence and papers concerning the British Standards Institution, the 'Allvey Project', IBM Rauf Book, and the British Computer Society; past examination papers for BSc, 1955-1970, 1980-1987; computer programming publications; Meek's articles on computers and programming; notes on the Single Transferable Vote in elections; pamphlets on automated voting systems; photographs.