From the Association of Research Libraries (CC BY), check out this infographic: How Fair Use Helps in Saving Software
PSU Libraries’ Software Curation Librarian, Seth Erickson, is working to identify software of cultural and scientific value in order to support both historical work on software and reproducibility in science. As a member of the Software Preservation Network, Penn State Libraries is at the forefront of efforts to develop standards and library services that facilitate long-term preservation and access to software.
See the full Code of Best Practices for Fair Use in Software Preservation, which guides practitioners on how and when to employ fair use in software preservation practices.