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Day 2: The History of Computers

Day 2: The History of Computers

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Day 2: The History of Computers

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  1. Day 2:The History of Computers Steven Andryzciksandryzc@mix.wvu.edu January 13, 2014

  2. What is a computer?

  3. com·put·er • An electronic device for storing and processing data, typically in binaryform, according to instructions given to it in a variable program.

  4. Electricity • A form of energyresulting in the flow of chargedparticles (electrons)

  5. Whatisbinary? • Relating to, using, or expressing a system of numerical notation that has 2 ratherthan 10 as a base. • 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 • 0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111

  6. Why do computers use binary? • Computers run on electricity • Electricityisgenerated in twoforms: • Analog/AlternatingCurrent • Continuous • Digital/Direct Current • Discrete

  7. Analog vs digital

  8. Analog computers ~ 1930 • ENIAC ~ 1946 • Cathode Ray tubes

  9. The transistor • Bardeen, Brattain, and Shockley ~ 1947 • Used as a switch (0 or 1) • Building block of modern computer

  10. Modern computers • 1955 and on • The integrated circuit (microchip)

  11. Modern computers

  12. Hardware • CPU – Central Processing Unit • GPU – GraphicsProcessing Unit • Motherboard • RAM – Random Access Memory • Power Supply

  13. Operating system • Windows • 98, 2000, XP, Vista, 7, 8 • MACOS • 10, Snow Leopard, Lion • Linux • Ubuntu, RedHat

  14. Applications • Microsoft Office • Excel, Access, Word, PowerPoint • Web Browsers • Internet Explorer, Chrome, FireFox • VideoGames • Call of Duty 29, FIFA, Solitaire • Media Software • VLC, Windows Media Player, iTunes

  15. END user