diff --git a/content/roadmaps/101-backend/content/102-os-general-knowledge/101-how-oss-work-in-general.md b/content/roadmaps/101-backend/content/102-os-general-knowledge/101-how-oss-work-in-general.md
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 # Operating Systems
+
+An operating system is a main program on computer, that governs all other applications. It allows you to use browsers, play games, print documents, launch your favorite program.
+
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://infinite.education/view/how_oss_work_in_general'>How OSs work in general</BadgeLink>
+<BadgeLink colorScheme='green' badgeText='Course' href='https://www.youtube.com/watch?v=9GDX-IyZ_C8'> Operating System Basics </BadgeLink>