RCS

Based on the provided news snippets, it is impossible to determine what 'RCS' refers to as an organization. The articles discuss unrelated topics: the release of Apple's iOS 26.5 public beta, detailing its availability and features for users to test, and a cycling race, specifically the Milan-San Remo, focusing on a particular cyclist's victory and its implications for future races. Neither snippet provides any information about an organization named 'RCS' or any context that would allow for its identification. Therefore, it's not possible to provide a summary of its background, recent events, or current relevance based solely on this information.