"As We May Think" by Vannevar Bush - year 1945
-uses for technology in the future
-preservation of human society - advances, discoveries, record of human history
*idea for the memex - inspiration for Ted Nelson's Xanadu project
-preserving human culture through use of technology - technology as culture? See Interface Culture
-use of html tags to create web pages with headers, body text, tables, images, links, etc.
HTML vs. XML - See Berners-Lee
-abacus-mechanical calculating device, use for calculating with base ten, changed to calculate base 2 (binary)
base ten conversions to binary, e.g.:
2(base ten)=10(base 2)
8=1000
24=11000
72=1001000
118=111011
-Euclid's elements - points, straight lines, proofs
Aristotle - Syllogism: All mammals are warm-blooded. All people are mammals; therefore, all people are warm-blooded.
Leibniz (1646-1716): Algebraically manipulate rational ideas. "Let's ratiocinate!"
Descartes - coordinate plane: brings geometry and algebra together
Boole and Frege - Boolean logic: can tak econcept or statement and determine if true or false and associate T and F with numbers and perform operations on them
Truth Tables
-logical operations: AND, OR, NOT, XOR