1. Data Representation
IGCSE Computer Science (0478)
  • Chapter 6: Automated & Emerging Technologies
  • Data Representation
    • Introduction
    • Why computers use binary (how binary represents data)
    • Number system
      • Introduction
      • Number Conversions
      • Addition of Binary Numbers
      • Logical binary shifts (positive 8-bit integers)
      • Two’s Complement (Signed: Positive and Negative Numbers)
      • Use of the Hexadecimal System
    • Text, Sound and Image
      • Text, Sound and Images
      • File Types
    • Data storage and File compression
      • Measurement of the Size of Computer Memories
      • Lossless and Lossy File Compression
  • Hardware
    • Computer Architecture
      • The CPU & Microprocessors
      • Von Neumann Architecture
      • Fetch-Decode-Execute Cycle (FDE)
      • Characteristics of the CPU
      • CPU Instruction Sets
      • Embedded Systems
    • Input/output devices
      • Input devices
      • Output devices
      • Sensors
    • Data Storage
      • What is Primary Storage?
      • What is Secondary Storage?
      • What is Virtual Memory?
      • What is cloud storage?
    • Network hardware
      • What is a Network Interface Card(NIC)?
      • MAC Addresses & IP Addresses
      • What is a Router?
  1. Data Representation

Text, Sound and Image

Text, Sound and Images
Understanding How Computers Store Text 1. The Basic Idea Computers only understand numbers! So every letter, number, and symbol needs a number code. ...
File Types
Musical Instrument Digital Interface (MIDI) MIDI is a communication protocol that lets electronic musical instruments talk to each other. It stores ...
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Use of the Hexadecimal System
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Text, Sound and Images
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