* Information the development of which an organization may have invested significant resources and has retained its importance, but has been created or stored by the use of software and/or hardware that has been rendered outmoded or obsolete. [1] [2]
* Information in the development process that may have significant resources invested into it that has been produced and/or stored on software or hardware that has become obsolete. [3]
* Information created or stored on software and/or hardware that is outmoded or obsolete. [4]

[1] Merrill Corporation, Electronic Discovery Glossary.
[2] Kroll Ontrack, Glossary of Terms, http://www.krollontrack.com/glossaryterms
[3] Vinson & Elkins LLP Practice Support, EDD Glossary.
[4] Legal Electronic Document Institute, Basic Principles of Automated Litigation Support (2005).

Attributions
- EDRM (http://edrm.net)