The historical record is increasingly digital. Over the last half century, under headings of “electronic records management” and “digital preservation,” librarians, archivists, and curators have established practices to ensure that our digital scientific, social and cultural record will be available to scholars and researchers into the future. This book is intended as a point of entry into that theory and practice. The book serves as both a basic introduction to the issues and practices of digital preservation and a theoretical framework for deliberately and intentionally approaching digital preservation as a field with multiple lineages. The intended audience is current and emerging library, archive, and museum professionals as well as the scholars and researchers who interface with these fields.