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- Introduction to Electronic Media
- Electronic Media: Class 13, Computers and Digital Networks
- 1 Bit
- 1.1 binary digit
- 1.2 fundamental building block of computing
- 1.3 expressed…
- 1.4 logical values
- yes/no
- true/false
- +/-
- on/off
- 2 Byte
- 2.1 basic unit of digital information
- 2.2 basic meaningful computer unit
- 3 Storage
- 3.1 Magnetic Storage
- magnetic tape
- magnetic disks
- 3.2 Optical Storage
- magento-optical drives
- CD and DVD
- 4 Diodes
- vacuum tubes
- Thomas Edison 1883
- John Fleming 1904
- Lee deForest 1912
- 4.5 ENIAC
- electronic numerical integrator and calculator
- processed calculations for the hydrogen bomb
- 4.6 Transistors
- Texas Instruments 1947
- Minicomputers
- 5 Microprocessors
- Intel 1971
- silicon switches
- microcomputers
- 6 Altair 8800
- 6.1 microcomputer, 1975
- 6.2 mail order
- 6.3 Altair BASIC
- written by Bill Gates
- Microsoft’s first product
- 6.4 specs
- Intel 8080 processor
- 256 bytes
- front panel with lights
- $400 kit. assembled for $500.
- 7 Alto
- 7.1 Xerox PAC
- 7.2 first personal computer
- 7.3 1973
- 7.4 desktop metaphor
- 7.5 Ethernet
- high-speed LAN
- Bob Metcalfe
- 8 Apple Computer
- 8.1 Apple II
- personal computer, 1977
- Steve Jobs and Wozniak
- 8.2 Macintosh
- 1984
- graphic user interface
- Hypercard
- linking on keywords or icons
- 9 International Business Machines
- 9.1 IBM PC
- 9.2 IBM PC, Jr.
- 10 Bulletin Board Systems
- 10.1 exchange email
- 10.2 post opinions
- 10.3 upload and download information
- 11 Commercial Internet
- 11.1 NSF withdrew funding
- 11.2 opened network to commercial users in 1991
- 11.3 post Cold War