The amount of digital content published over the past ten years has grown exponentially. In order to ensure long-term access to this content publishers, libraries and institutional repositories work together to promote digital preservation to meet the needs of tomorrow's users. A model program in the US for digital preservation is a non-profit organization, Portico.
Portico is dedicated to the preservation of scholarly digital content. They define digital preservation as the following:
Digital preservation is defined as the series of management policies and activities necessary to ensure the enduring usability, authenticity, discoverability, and accessibility of content over the very long-term.
In contrast to the above definition of digital preservation, Portico also defines what is it not; short-term backup, byte replication and system redundancy. While these are important to any digital archive, a digital preservation program implements procedures and processes that ensure usability, authenticity, discoverability and accessibility for generation to come.