EECS 1520 Lecture Notes - Lecture 1: Apollo Program, Ibm, Wilhelm Schickard

• School: York University
• Department: Electrical Engineering and Computer Science
• Course: EECS 1520
• Professor: Steven Castellucci

Document Summary

Beads used to indicate values- numbers can be added/subtracted. Used in children toys or tool to keep score of game. Wilhelm schickard - earliest know inventor of mechanical calculating device (1623) Blaise pascal- 1st to implement mechanical calculating device (1642) Able to add/ subtract by turning dials to change values. Jackard loom (1801)- used punch cards to define complex patterns. Punch cards later used to code computer programs. Invented by charles babbage (1934, not fully developed, not possible at the time) Used to calculate solutions to mathematical functions. Wrote program for ae to calculate be(cid:396)(cid:374)oulli #(cid:859)s (cid:894)(cid:373)ath se(cid:395)ue(cid:374)(cid:272)e (cid:396)ep(cid:859)i(cid:374)g trig funct. ) Used vacuum tubes to control flow of electrical signals. Apollo space program depends on computers to calculate trajectories & control guidance. Onboard guidance computers have less processing power than modern appliances but w/auto-piolet capabilities. Lead the team who coded programing for the guidance computer. Commercialized early machines (1890s), mainframe computers (1960s) & modern servers (present)