CAS CS 101 Lecture Notes - Lecture 1: Operating System, Parallel Computing, Time-Sharing
7 Sep 2016
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Isaac bookbinder: the first computers, first devices of computation were our hands a. i. Used to count and solve complex issues: devices like astronomical calendars(stonehenge) picture and abacuses (counting thing with beads) took over b. i. Pebbles used to count also, calculate comes from latin word pebble: our class is centered around mechanical and electro-mechanical devices, generation 0: mechanical computers, 1642-pascal buiilds a mechanical calculating mactine b. Jacquard then makes a punch card machine: 1930-engineers start using electromagnetic relays, 1800s- babbage designes punch card machine far beyond the times but never builds it d. i. Electromagnetic relays are switches that open and close by electrical current e. (stibitz) bell labs builds mark 1 computer following desisgns of babbage e. i. Could store 72 numbers, required time to perform calculations(still fastest yet: generation 1: vacuum tybes, vacuum tubes are light bulbs in a partial vacuum to speed electron flow a. i. Faster than relays(bc no moving parts: 1940s: hybrid computer built(with vaccums and relays) b. i.
