5.5. Concepts¶ Conceptual overviews provide relatively high-level, general background information about key aspects of ROS 2. 5.5.1. Basic Concepts 5.5.2. Intermediate Concepts 5.5.3. Advanced Concepts 5.5.4. Related Content¶ See the ROS 2 citations for more explanation of concepts and citable resources. For a brief video introduction to ROS 2, see this community contributed content: Getting started with ROS Part 1: Nodes, Parameters and Topics Getting started with ROS Part 2: Services and Actions