https://www.youtube.com/watch?v=Qyb5KZC7d6s
https://www.youtube.com/watch?v=BpmAFwZy0Gg
https://www.youtube.com/watch?v=P0xwiM-azU0
https://www.youtube.com/watch?v=U3xJ1WsELgI
https://www.youtube.com/watch?v=pRbs3xTltqA
https://en.m.wikipedia.org/wiki/Open-source_software
https://en.m.wikipedia.org/wiki/Free_software
https://opensource.org/docs/osd
https://www.youtube.com/watch?v=SpeDK1TPbew
https://en.wikipedia.org/wiki/Richard_Stallman
https://en.wikipedia.org/wiki/GNU
https://en.wikipedia.org/wiki/Linux_kernel
https://en.wikipedia.org/wiki/Linux
https://es.wikipedia.org/wiki/Unix-like
https://en.wikipedia.org/wiki/Unix-like
https://en.wikipedia.org/wiki/Unix
https://en.wikipedia.org/wiki/MacOS
https://en.wikipedia.org/wiki/Kernel_(operating_system)
https://en.wikipedia.org/wiki/GNU/Linux_naming_controversy
https://es.wikipedia.org/wiki/Controversia_por_la_denominaci%C3%B3n_GNU/Linux#Historia
https://en.wikipedia.org/wiki/Linux_distribution
https://www.youtube.com/watch?v=BTeR4UmiUlU
https://en.wikipedia.org/wiki/Open_Source_Initiative
https://en.wikipedia.org/wiki/Usage_share_of_operating_systems
https://en.wikipedia.org/wiki/Linux_adoption#Servers