Ashurst, F. Gareth. Pioneers of Computing. London: Frederick Muller Limited, 1983.

Babbage, Charles. The Analytical Engine and Mechanical Notation. Ed. Martin Campbell-Kelly. London: William Pickering, 1989. Vol. 3 of The Works of Charles Babbage. 3 vols. 1989.

---. Charles Babbage on the Principles and Development of the Calculator. Ed. Philip Morrison and Emily Morrison. New York: Dover Publications, Inc., 1961.

---. Passages from the Life of a Philosopher. London: Longman, Green, Longman, Roberts, and Green, 1864.

---. Science and Reform: Selected Works of Charles Babbage. Ed. Anthony Hyman. Cambridge: Cambridge University Press, 1989.

Buxton, H.W. Memoir of the Life and Labours of the Late Charles Babbage Esq. F.R.S. Cambridge, MA: The MIT Press, 1988. Vol. 13 of The Charles Babbage Institute Reprint Series for the History of Computing. 13 vols. 1984-1988.

Collier, Bruce. The Little Engine that Could’ve: The Calculating Machines of Charles Babbage. New York: Garland Publishing, Inc., 1990.

Lee, J.A.N. Computer Pioneers. Los Alamitos, CA: IEEE Computer Society Press, 1995.

Swade, Doron. Charles Babbage and his Calculating Engines. London: Trustees of the Science Museum, 1991.