The application of specific strategies, activities and technologies for the purpose of ensuring an accurate rendering of digital content over time. It facilitates the reuse of research data, objects, and related resources and may include activities related to sustainability and interoperability. Related techniques include but are not limited to: Bit Stream Preservation, Durable Persistent Media, Emulation, Metadata Attachment, Migration, Replication, Technology Preservation, Versioning, the use of Open Archival Information Systems and standards that support interoperability.