A Symposium on Digital Computing Machines. Edited by B V Bowden. A series of articles on the subject of computers and computing. Includes a historical section dealing, in particular, with Babbage and his Difference Engine and material produced by Ada Augusta, The Countess of Lovelace, the celebrated (though probably not enough) 19th century mathematician who collaborated with Babbage. There is also a chapter written by Alan Turing. Used hardback with dust jacket. Book very good; jacket poor. Book clean externally with slight bumping to the top and bottom of the spine and one or two small bumps to the bottom edge and slight bumping to the bottom corner of the rear board. The top and bottom of the spine have also some small suggestions of fading, coincident with tears to the dj. The inside bottom and top edges of the rear board, where it is exposed below and above the rear paste down, has some signs of spotting. Edges of the text block are slightly darkened. The gilt title and other wording on the spine and the Pitman's logo on the front board are all bright and clear. There is some incipient spotting to the paste downs and free endpapers, back and front. othewise the book is clean internally with sound binding. The dj (un price clipped) is intact, but is variously chipped, worn at the edges, with closed tears (2 - 3 cm) at the top and bottom of the spine and with browning externally and internally.