CPET10 2

• Operating system


  The most important software that runs on a computer. A program that manages the other applications/programs in a computer.
• Basic tasks of an operating system in a computer


  • File management
  • Peripheral control
  • Input/output recognition
• Major types of computer operating systems


  • Batch operating system
  • Multi-tasking operating system
  • Distributed operating system
  • Network operating system
  • Real-time operating system
• Batch operating system


  • Does not interact directly with the computer
• Multi-tasking operating system


  • Allows the user to directly send instructions to the OS, which then accomplishes numerous tasks at the same time
  • Applications are stored in computer memory and run on the same CPU
  • The jobs swap quickly from one to another, providing the user(s) with a fast response
• Distributed operating system


  • Employs numerous CPUs to support various tasks and users
  • Each computer has its own memory unit and CPU, and they are all linked together and communicate via a shared communication network
• Network operating system


  • Operates on a server and can manage data, users, groups, security, applications, and other network activities
  • Enables shared access to files, printers, security, programs, and other networking capabilities over a small private network, or LAN
• Real-time operating system


  • Designed for real-time applications
  • The time necessary to process and respond to inputs is relatively short (response time)
  • Used in applications with strict time constraints, such as missile systems, air traffic control systems, robots, and so on