Mark Priestley (Westminster)
Why the ACE Had No
Order Code

In 1945, John von Neumann and Alan Turing both proposed designs for electronic digital computers, the EDVAC and the ACE. Despite many similarities in hardware, there were profound differences in the ways in which these machines were to be programmed. This talk examines the different approaches to programming taken by von Neumann and Turing, and suggests that by looking at the wider scientific interests of the two men and their attitudes to logic and the philosophy of mathematics, we can come to a better understanding of their divergent programming practices.