Juan Monroy — 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
  - 0
- 1.4 logical values
  - yes/no
  - true/false
  - +/-
  - on/off
2 Byte
- 2.1 basic unit of digital information
  - usually eight bits
- 2.2 basic meaningful computer unit
  - a letter of text
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
    - cabinet sized computers
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
  - mouse
  - GUI
- 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