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- Week 13, Computers
- All Computers
- input
- output
- hardware
- software
- Mechanical Computer
- Joseph-Marie Jacquard
- mechanical loom
- punch card
- corresponding to the weave
- Charles Babbage
- analytical engine, 1834
- grind out calculations in a mill
- input/output: punch cards
- Bit
- binary digit
- fundamental building block of computing
- expressed…
- logical values
- yes/no
- true/false
- +/-
- on/off
- Byte
- basic unit of digital information
- hexadecimal: 4 bits
- text: 7–8 bits
- basic meaningful computer unit
- Diodes
- vacuum tubes
- Thomas Edison 1883
- John Fleming 1904
- Lee deForest 1912
- ENIAC
- electronic numerical integrator and calculator
- processed calculations for the hydrogen bomb
- Transistors
- Texas Instruments 1947
- Minicomputers
- Microprocessors
- Intel 1971
- silicon switches
- microcomputers
- Altair 8800
- microcomputer, 1975
- mail order
- Altair BASIC
- written by Bill Gates
- Microsoft’s first product
- specs
- Intel 8080 processor
- 256 bytes
- front panel with lights
- $400 kit. assembled for $500.
- Alto
- Xerox PARC
- first personal computer
- 1973
- desktop metaphor
- Ethernet
- high-speed LAN
- Bob Metcalfe
- Apple Computer
- Apple II
- personal computer, 1977
- Steve Jobs and Wozniak
- Macintosh
- 1984
- graphic user interface
- Hypercard
- linking on keywords or icons
- International Business Machines