Introduction to Real Time Systems. Hard Vs .Soft Vs. Firm real time systems.GPOS Vs. RTOS Cyclic Executive (Super Loop)Foreground/Background Executive RTOS Executive Real Time Systems Concepts. RTOS KernelScheduler.Tasks status.Inter task Synchronization (Semaphores, Mutex)Task Priority, Priority Inversion and Priority Inheritance.Inter task communication (Mailbox and Message queue).