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  • CS401: Operating Systems
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  • Real-time Operating Systems and Microkernels
    Course Introduction
    Course Syllabus
    Unit 1: Introduction to Operating Systems
    1.1: History of Operating Systems
    What Is an Operating System?
    History of Operating Systems
    1.2: Operating System Structure
    OS History, Services, and Structure
    1.2.1: Abstract Computer Component Overview
    Computer System Overview
    1.2.2: Functional Overview
    What Is an Operating System?
    1.3: Different Operating Systems Overview
    Different Operating Systems
    1.3.1: 32-Bit vs. 64-Bit OS
    32-bit and 64-bit Explained
    32-bit and 64-bit Frequently Asked Questions
    1.3.2: UNIX-based
    The Unix Operating System: Mature, Standardized and State-of-the-Art
    1.3.2.1: Linux (Ubuntu, Fedora, etc.)
    What Is Linux?
    1.3.2.2: Solaris
    Solaris
    1.3.3: Windows
    Microsoft Windows
    1.3.4: Mobile
    iOS (Apple)
    Android
    Windows Phone
    1.3.5: Real-Time
    Introduction to Real-Time Systems
    Introduction to Embedded and Real-Time Operating Systems
    Real-time Operating Systems and Microkernels
    Embedded System Software
    VxWorks
    QNX
    Unit 2: Processes and Threads
    2.1: Concurrency
    Concurrency: Processes, Threads, and Address Spaces
    Concurrency
    2.2: Processes
    Processes
    Processes and Process Management
    The Process Concept
    2.3: Threads
    A Brief Introduction to Threads
    Threads and Concurrency
    Threads
    More on Threads
    2.4: Context Switch
    Context Switching
    Context Switches
    Processes and Threads
    Putting the P in Threads
    Unit 3: Synchronization
    3.1: Synchronization: Relevance and Problems
    Synchronization
    Introduction to Synchronization
    3.2: Race Conditions
    Introduction to Race Conditions
    3.3: Semaphores
    Mutual Exclusion, Semaphores, Monitors, and Condition Variables
    Semaphores
    Java Semaphores
    Programming Paradigms
    Monitors and Condition Variables
    Unit 4: CPU Scheduling
    4.1: Scheduling General Objective
    Thread Scheduling
    CPU Scheduling
    4.2: Goals
    More on CPU Scheduling
    4.3: Types
    Types of CPU Scheduling
    4.4: Algorithms
    Scheduling Algorithms
    Unit 4 Exercises and Assessment
    CPU Scheduling Simulation Exercises
    Unit 4 Assessment
    Unit 5: Deadlock
    5.1: Definition
    Deadlock
    Deadlock
    5.2: Deadlock Prevention and Avoidance
    Operating Systems
    Banker's Algorithm Problem Set
    5.3: Deadlock Detection and Recovery
    Deadlock
    Deadlock Simulation Lab
    Unit 6: Memory Management
    6.1: Overview of Memory Management
    Memory Management
    6.1.1: Memory Hierarchy
    Overview of Memory Hierarchy
    6.1.2: OS Interaction with Memory Levels
    Paging
    6.1.3: Virtual Memory
    Virtual Memory
    More on Virtual Memory
    6.2: Allocating Memory
    Memory Management
    Memory Management Simulation
    6.3: Memory Access
    Segmentation
    Intel Memory Management
    The GDT
    Paging and Memory Access
    Unit 7: File System
    7.1: Introduction to File Systems
    File Systems and Disk Management
    File Systems
    7.2: File Allocation Methods
    File Management
    The File System
    7.3: Disk Management Algorithms
    File Systems and Disk Management
    Queueing Models
    Disk Scheduling
    Unit 7 Activities
    Disk Scheduling Simulation Lab
    File System Simulation Lab
    Disk Management Algorithms Exercises
    Unit 8: Security
    8.1: Introduction to Security
    Introduction to Security
    Protection and Security
    More on Security
    8.2: Malicious Software Overview
    Malware: Viruses and Worms
    Bots and Botnets
    8.3: Security Techniques
    Protection
    Security Strategies
    Security Techniques
    Intrusion Detection and Prevention Systems
    Unit 9: Networking
    9.1: Introduction
    Introduction to Networks
    Computer Networking
    More on Networking
    9.2: Protocol Architecture
    Layering and the Link Layer
    9.3: The Reference Models
    Computer Networking
    TCP/IP Networking
    An Overview of TCP/IP Protocols and the Internet
    Animation of the OSI Model
    Introduction to the OSI Model
    9.4: Network Intrusion Detection
    Intrusion Detection and Prevention Systems
    Study Guide
    CS401 Study Guide
    Course Feedback Survey
    Course Feedback Survey
    Certificate Final Exam
    CS401: Certificate Final Exam
    Archived Materials
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  1. CS401: Operating Systems
  2. Unit 1: Introduction to Operating Systems
  3. 1.3: Different Operating Systems Overview
  4. 1.3.5: Real-Time
  5. Real-time Operating Systems and Microkernels

Real-time Operating Systems and Microkernels

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Read this article for a good overview of real-time operating systems.

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Saylor Academy © 2010-2025 except as otherwise noted. Excluding course final exams, content authored by Saylor Academy is available under a Creative Commons Attribution 3.0 Unported license. Third-party materials are the copyright of their respective owners and shared under various licenses. See detailed licensing information. Saylor Academy®, Saylor.org®, and Harnessing Technology to Make Education Free® are trade names of the Constitution Foundation, a 501(c)(3) organization through which our educational activities are conducted.