British Mathematician who did fundamental work on the theory of modern computer science.
Defined a simple but elegant mathematical model of a general purpose computer, now called the Turing Machine, and used it to prove what was possible or impossible for computers to do. Couldn’t get the money to build one.
Today, the ACM’s Turing Award is considered to be like the Nobel Prize of computing.
Alan Turing (1912- 1954)
Alan Turing Invented the Turing test Laid the foundation for modern computers Helped crack German codes during WWII A German Enigma message encoder
Used semiconductor transistor chips developed at Bell Labs
1955 : IBM computer with 2000 transistors. By 1959, deliveries made the vacuum tube computers outmoded. Included very large mainframes, such as the IBM 7090, and smaller machines, such as the IBM 1401.
COMPUTERS THAT WILL TAKE SPEECH INPUT AND OUTPUT, IN “NATURAL LANGUAGE”
“Easy to use” computers require tremendous speed. By the end of the 20th century, speeds are measured in MIPS- millions of instructions per second. Many computers now do 1000 MIPS ( a billion instructions/sec)