## Alan Turing's Electronic Brain: The Struggle to Build the ACE, the World's Fastest ComputerThe mathematical genius Alan Turing, now well known for his crucial wartime role in breaking the ENIGMA code, was the first to conceive of the fundamental principle of the modern computer-the idea of controlling a computing machine's operations by means of a program of coded instructions, stored in the machine's 'memory'. In 1945 Turing drew up his revolutionary design for an electronic computing machine-his Automatic Computing Engine ('ACE'). A pilot model of the ACE ran its first program in 1950 and the production version, the 'DEUCE', went on to become a cornerstone of the fledgling British computer industry. The first 'personal' computer was based on Turing's ACE. Alan Turing's Automatic Computing Engine describes Turing's struggle to build the modern computer. The first detailed history of Turing's contributions to computer science, this text is essential reading for anyone interested in the history of the computer and the history of mathematics. It contains first hand accounts by Turing and by the pioneers of computing who worked with him. As well as relating the story of the invention of the computer, the book clearly describes the hardware and software of the ACE-including the very first computer programs. The book is intended to be accessible to everyone with an interest in computing, and contains numerous diagrams and illustrations as well as original photographs. The book contains chapters describing Turing's path-breaking research in the fields of Artificial Intelligence (AI) and Artificial Life (A-Life). The book has an extensive system of hyperlinks to The Turing Archive for the History of Computing, an on-line library of digital facsimiles of typewritten documents by Turing and the other scientists who pioneered the electronic computer. |

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### Contents

3 The origins and developmentof the ACE project | |

4 The Pilot ACE at the NationalPhysical Laboratory1 | |

from concept to reality | |

12 Applications of the Pilot ACE and the DEUCE | |

13 The ACE Test Assemblythe Pilot ACE the Big ACEand the Bendix G 15 | |

14 The DEUCEa users view | |

15 The ACE Simulator andthe Cybernetic Model | |

16 The Pilot Model and theBig ACE on the web | |

Part IV Electronics | |

17 How valves work | |

Early programming efforts | |

Part IITuring and the History of Computing | |

5 Turing and the computer | |

6 The ACE and the shaping of British computing | |

7From Turing machine to electronic brain | |

8 Computer architecture and the ACE computers | |

Part IIIThe ACE Computers | |

9 The Pilot ACE instruction format | |

10 Programming the Pilot ACE | |

18 Recollections of early vacuum tube circuits | |

19 Circuit design of the Pilot ACE and the Big ACE | |

Part VTechnical Reports and Lectures on the ACE194547 | |

20 Proposed electronic calculator 1945 | |

21 Notes on memory 1945 | |

22 The TuringWilkinson lecture series 19467 | |

23The state of the art in electronic digital computing in Britain and the United States 1947 | |

### Other editions - View all

Alan Turing's Automatic Computing Engine: The Master Codebreaker's Struggle ... Sir James George Frazer No preview available - 2005 |

Alan Turing's Automatic Computing Engine: The Master Codebreaker's Struggle ... B. Jack Copeland No preview available - 2005 |

### Common terms and phrases

adder Alan Turing anode architecture arithmetic Automatic Computing Engine Big ACE binary bits Bletchley Park Cambridge cathode Computable Numbers computing machine Computing www.AlanTuring.net connection construction Darwin decimal delay line DEUCE differential analyser digital computer digital facsimile document reference DSIR DSIR EDSAC EDVAC English Electric ENIAC equations equipment example Executive Committee frequency grid hardware History of Computing Hollerith Huskey input and output instruction tables lectures logical loop magnetic drum Manchester Mathematics Division memory mercury delay lines minor cycle Moore School multiplication National Physical Laboratory Neumann Newman operations Pilot ACE Pilot Model ACE possible problems Proposed Electronic Calculator pulse punched cards RISC signal speed staticiser storage stored-program subroutines switches tape transfer TRANSTIM trigger circuit tube Turing Archive Turing machine Turing’s unit University valve Version voltage Wait Number Wilkinson Womersley Woodger Papers word zero