SECTION1OverviewdescribeswhattheOSEKOSisandhighlightsitsbasicfeatures.SECTION2NotationcontainsthedescriptionoftheManualstructure,typographicalconventionsandthelistofacronyms.SECTION3OperatingSystemArchitecturegivesthehighleveldescriptionofOSarchitectureandpresentsOSConformanceClasses.