If trials of three or four simple cases have been made, and are found to agree with the results given by the engine, it is scarcely possible that there can be any error (...). Charles Babbage, On the mathematical powers of the calculating engine (1837) Anybody who has something to do with modern computers will agree that the above statement made by Charles Babbage about the analytical engine is understatement, to say the least. Computer programs do not always work as expected. There is a complex taxo[...]