The scanner moves back and forth through the memory, examining one square at a time (the 'scanned square').It reads the symbols on the tape and writes further symbols.By the end of 1945, thanks to wartime developments in digital electronics, groups in Britain and in the United States had embarked on creating a universal Turing machine in hardware.Turing headed a group situated at the National Physical Laboratory (NPL) in Teddington, London.
Part I of 'Alan Turing, Father of the Modern Computer' provides an overview of Turing's many major contributions to the development of the computer and computing—including his pioneering work in the areas now called Artificial Intelligence and Artificial Life. This is simply one of the best tales in the history of computers.
This work had a profound influence on the development in the 1940s of the electronic stored-program digital computer, an influence often neglected or denied by historians of the computer. It consists of a scanner and a limitless memory-tape.
The tape is divided into squares, each of which may be blank or may bear a single symbol ('0' or '1', for example, or some other symbol taken from a finite alphabet).
There is a happy ending—but by that time Turing had turned his back on the ACE forever.
Much of Part II is in the words of the original protagonists, drawn from documents of the time.