Complex sentence: The Indian Space research Organization is currently developing a launch system called the RLV (Reusable launch vehicle), it is India's first step towards realizing a Two Stage To Orbit re-usable launch vehicle.
Split into simpler sentences: The Indian Space research Organization is currently developing a launch system currently named the RLV (Reusable launch vehicle). It is India's first step towards realizing a Two Stage To Orbit re-usable launch vehicle.