Robot Operating Systems (ROS) is a set of open-source software libraries and tools used to develop and control robots. It is a specialized skill that requires proficiency in programming languages such as C++ and Python, as well as knowledge of robotics hardware and software. ROS allows developers to create complex robot behavior and applications by providing access to a wide range of algorithms and tools for perception, control, and communication. ROS is widely used in research, industry, and robotics competitions.