Hello,

Differences from non real time OS is(i.e. RTOS is)

1.Preemptive priority based scheduling 2.Low interrrupt latency 3.Low context switching(no need to  store and restore  virtual address context) 4.Small and configurable(MicroKernel) 5.Fast 6.No system call overhead 6.Interprocess comunication and synchronisation 7.Multitasking.