Definitions

[Airicist]

Operating system (https://en.wikipedia.org/wiki/Operating_system) on Wikipedia

List of operating systems (https://en.wikipedia.org/wiki/List_of_operating_systems) on Wikipedia

[Airicist]

Embedded system (https://en.wikipedia.org/wiki/Embedded_system) on Wikipedia

List of embedded operating systems (https://en.wikipedia.org/wiki/List_of_operating_systems#Embedded) on Wikipedia