: with interesting & curious anecdotes celebrated and distinguished characters fully illustrating a variety of instructive and amusing scenes ; as performed within and without the remarkable difference engine Padua, Sydney creator text Canada Penguin random house 2016 monographic 315 p. ;24 cm. : ill. History of computing Computer science Scientific collaboration Imaginary quantities Analytical Engine Charles Babbage GGC FC 004.092 PAD 9780141981536 (pbk.)