EECS 1520 Lecture Notes - Lecture 1: William Oughtred, Claude Shannon, Enigma Machine

• School: York University
• Department: Electrical Engineering and Computer Science
• Course: EECS 1520
• Professor: John Hofbauer

Document Summary

George bool (1815-1864: laid logical foundations of digital computing circuitry, also, invariant theory later used by einstein in his theory of relativity. Inventor: used in science and engineering, replaced by electronic pocket calculator around 1974. It was the most sophisticated code system of its day: priority for the allies to break it as the germans believed it was unbreakable, turing broke this code. Turing and his colossus: made an electronic computing machine in 1943 to help decrypt german coded messages, many believe this advanced the end of the war by 2 years. Ibm harvard mark i (1944: howard aiken and thomas watson. It was 51 feet long, 5 tons and had 750 000 parts. Von neumann architecture: stored program, binary internal coding, cpu-memory-i/o organization, fetch-decode-execute instruction cycle, neumann proposed that data and production can be in same storage. Univac, i: first commercial general-purpose computer, built by mauchly and eckert, delivered in 1951, used to forecast the 1952 us election.