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MACHINE ARCHITECTURE AND THEIR HISTORICAL CONTEXT

3. Historical Evolution of Machine Architecture

c. Third Generation (1960s–1970s): Integrated Circuits (ICs)

  • Technology: Integrated circuits (ICs) combined multiple transistors on a single chip.
  • Examples: IBM System/360, DEC PDP-8.
  • Characteristics:
    • Smaller, faster, and more energy-efficient.
    • Operating systems and time-sharing systems emerged.
    • Use of high-level languages like C and Pascal.

d. Fourth Generation (1970s–1990s): Microprocessors

  • Technology: Microprocessors integrated the CPU onto a single chip.
  • Examples: Intel 4004 (1971), Apple II (1977), IBM PC (1981).
  • Characteristics:
    • Personal computers (PCs) became widely available.
    • Graphical User Interfaces (GUIs) and networking technologies emerged.
    • Development of object-oriented programming (e.g., C++, Java).

e. Fifth Generation (1990s–Present): Parallel Processing and AI

  • Technology: Advances in parallel processing, artificial intelligence (AI), and quantum computing.
  • Examples: Multi-core processors, GPUs, IBM Watson, Google Quantum Computer.
  • Characteristics:
    • Emphasis on parallel and distributed computing.
    • Integration of AI and machine learning into systems.
    • Development of quantum computers for solving complex problems.