EECS 1520 Lecture Notes - Lecture 1: Graphical User Interface, Bit Rate, Huffman Coding

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

Document Summary

Eecs 1520: office hours wednesdays noon-1pm, section c. Wilhelm schickard: earliest known investor of a mechanical calculating device (1623) Blaise pascal: first to implement a mechanical calculating device, designed independently of. Schickard(1642: able to add and subtract by turning dials to change values, mechanical calculator each wheel displays a number, turning wheels clockwise or counter- clockwise to add and subtract. Pascal first to implement calculating device. Both these people share credit for first mechanical calculator. Programmable machines: jacquardloom (by joseph marie jacquard, 1801, used punch cards to define complex patterns, patterns woven into textiles, punch cards were later used to code computer programs. Jacquard loom automated the loom process, textile prices decreased, first programmable machine: simplified the process of manufacturing textiles. Introduced punched cards used to do it by hand: cards stored patterns in them, cards had ability to store info in them, helped spark computer revolution, machine following pattern computer following an algorithm, (cid:862)po(cid:449)er loo(cid:373)(cid:863)