<b>Study on Real time Operating System and its Scheduling Procedures</b> This paper describes current research in real time operating system and its scheduling procedures. The scheduling procedure is the backbone of any operating systems. In this paper we analyses the application of scheduling theory to dependable real time systems are reviewed with a brief summary and conclude that different types of scheduling procedures are used in real time operating system. Issues covered include static and dynamic algorithms, application of real time operating system, rate monotonic and deadline monotonic with examples. This paper describes about characteristics of real time operating system. RTOS Real time operating system, RMS Rate monotonic scheduling, DM Deadline monotonic, EDF Earliest deadline first, LSF Least stack time first 1368-1370 Issue-2 Volume-2 Durgesh Raghuvanshi