DS-links were created to provide a low-latency, high performance data link between parallel processors. When the primary processor using them was withdrawn these links largely disappeared from view but were, in fact, still being used (albeit not for parallel computing) in the Space industry. The potential for these links, with their simple implementation, led to their adoption, in modified form, for a growing range of data communication applications. In 2003, the European Space Agency published a definition of DS-links known as SpaceWire. We briefly describe the original DS-links and detail how SpaceWire has kept or modified them to produce a now popular technology with a rapidly increasing number of implementations and wide take-up.