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Computing Systems

  • Dynamic entity used to solve problems
  • Composed of hardware, software, and data
    • Hardware: physical elements of computing system
    • Software: Programs providing instructions for system to execute

Layers

Layers of a Computing System

  • Information Layer
    • The way we represent information
    • Mostly conceptual
  • Hardware Layer
  • Programming Layer
    • Software
  • Operating Systems Layer
    • Help us interact with the computer system
    • Manage the way hardware, programs, and data interact
  • Applications Layer
    • Using the computer to solve real world problems
  • Communications Layer

Prefixes

Power of 10 Power of 2 Value of Power of 2 Prefix Abbreviation Derivation
10āˆ’1210^{-12} pico- p Italian for little
10āˆ’910^{-9} nano- n Greek for dwarf
10āˆ’610^{-6} micro- Ī¼ Greek for small
10āˆ’310^{-3} milli- m Latin for thousandth
10310^{3} 2^{10} 1024 kilo- K Greek for thousand
10610^{6} 2^{20} 1,048,576 mega- M Greek for large
10910^{9} 2^{30} 1,073,741,824 giga- G Greek for giant
101210^{12} 2^{40} not enough room tera- T Greek for monster
101510^{15} 2^{50} not enough room peta- P Greek for five

Computer Science