The new Code of Best Practices in Fair Use for Software Preservation provides clear guidance on the legality of archiving legacy software to ensure continued access to digital files of all kinds and to illuminate the history of technology. This Code was made by and for the software preservation community, with the help of legal and technical experts. The publication provides librarians, archivists, curators, and others who work to preserve software with a tool to guide their reasoning about when and how to employ fair use—the legal doctrine that allows many value-added uses of copyrighted materials—in the most common situations they currently face.