x
  
  
Linux OS
  Android-X86, DebianFedora, Gentoo, LineageOS, Mklinux, Mint, Open-SUSEUbuntu, Slackware
Linux for Education & Kids: 
  Edubuntu, Epoptes, Opensis, Ubermix
Linux: Enterprise Servers:
  CentOS, LineoxRed Hat, ScientificLinuxSUSE, Ubuntu
Linux for Very Old Hardware & Netbooks:
  Budgie-Ubuntu, DebianDog, ElementaryOSPuppyLinux, Slitaz, Xubuntu,
Linux-Unix Related:
  Distrotest, Distrowatch (OSDisk),  FinkMacOSForge, UnixGuide, GNU Hurd, Unix History, Commands, Cheat-Sheet
Linux Desktops: Run KDE Cross-Platform
  KDE for MacOS,  KDE for Windows
Unix OSes:
  ECosFreeBSDFreesBIE, FuryBSD, Illuos, Minix3NetBSDOpenBSDOpenIndiana
Other OSes:
  GNU HurdReactOSTemple OS
Oldies But Goodies
  Apple McpaintAranyM ATARI  Emulator, AROS Amiga OS,  Amikit: Amiga EmulatorAftershock, DexOS, DOSBoxFreeDos,
  Haiku (BeOS), GoFish Gopher/Web Servers, KolibirOSLUnix: Commodore64, MacOS9 AppMenuetOS, Minix3, MorphOS (PPC), MS-DOS,
  OpenVMS, AtheOS, Stella Atari 2600, Visopsys, Windows95 App
Open Source Licenses:
  Open Source Licenses
  The Free Software Foundation
  Copy-left, Noncopy-Left, & X11
  Free and Non Free Software
Other Linux & BIOS Firmware Issues:
  Linux Foundation Secure Boot System