SOFA-122 Lecture Notes - Lecture 1: Konrad Zuse, Jack Kilby, Slide Rule
2 Sep 2018
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Also used to idea of card input/output and memory. Punch cards use binary to read info using holes and lack of holes in card. First representation of the computer was an abacus around same time as money was created. 1614: john napier uses rods to multiply and divide. 1625: slide rule invented using napier"s work and helps discover logs. Early 1800s: charles babbage made difference engine - designed to improve the accuracy of hand calculated math. Hollerith used punch cards to input data into computers. Mechanical and electromechanical devices are still limited because results have to be interpreted through people. 1906: lee forest created the vacuum tube which was totally electronic. 1946: eniac created by eckert and mauchly - used by military primarily and spit out 100k calc/sec. Infinitely more bools on hardware oss made soon after. Valves are unreliable bc they get so hot. Limited capacity of memory and got around that with magnetic drums to store info and.
