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Appendix D - OS Families

D1 - Unix-like Operating Systems​

D2 - Microsoft Windows Operating Systems​

D3 - Mobile Operating Systems​

  • Android (based on Linux kernel)
  • iOS (used in iPhones, iPads, and iPod Touch)

D4 - Real-Time Operating Systems (RTOS)​

D5 - Embedded Operating Systems​

D6 - Mainframe Operating Systems​

note

Please note that this is not an exhaustive list, but it covers some of the most well-known operating systems in each category.