The primary aim of the subject is to introduce students to the fundamentals and practice of parallel and event-driven programming because due to the growing complexity of embedded software and the emergence of many processor, distributed, heterogeneous system architectures this programming model is in the center of interest. To reach its aim the subject introduces the fundamental architecture and internal operation of embedded operating systems, the provided services to implement applications, both on the kernel and application programming interface level. The subject uses the FreeRTOS () and UNIX/Linux embedded operating systems to demonstrate the introduced topics, detailing the fulfillment of real-time requirements, memory handling, reliability, and resource virtualization related aspects also.