Operating System

A collection of software on a computer that allows the user to access and use the computer's memory, file system, process, hardware & software, and program applications.

Components

• Kernel
• Utilities
• Interfaces
• Software Programs

Common OSs

• Microsoft-Windows
• Apple-macOS
• Linux
• Chrome-OS

Features

• Multiprocessing (multiple CPUs in use)
• Multitasking (runs applications simultaneously)
  • Cooperative (requires processes to work together)
  • Preemptive (forces applications to share processing resources)
• Multithreading (runs different parts of a program simultaneously)

Basic Actions (Raw Lesson Content)

• Receive user input from devices such as the keyboard or mouse.
• Send user output to devices such as the monitor or a printer.
• Control processing devices by applications.
• Serve as a platform for applications.
• Moderate hardware.
• Provide security.
• Manage the file system.

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