• s., Contents of databases that precede the installation and implementation of new systems. (Horiuchi, 2005a)
• s., Data that you already have and use. (Bellateche & Mohania, 2005)
• s., Electronically stored information (ESI) in which an organization may have invested significant resources, but has been created or stored by the use of software and/or hardware that has become obsolete or replaced ("legacy systems").