* A storage medium capable of storing large amounts of data. Disk types include magnetic disks (both hard disks and floppy disks) and optical disks. [1]
* A magnetic floppy or hard disk. [2]
* Round, flat storage media with layers of material which enable the recording of data. [3]
* It may be a floppy disk, or it may be a hard disk. Either way, it is a magnetic storage medium on which data is digitally stored. A disc may also refer to a CD-ROM [4]

[1] Legal Electronic Document Institute, Basic Principles of Automated Litigation Support (2005).
[2] American Document Management, Glossary of Terms, http://www.amdoc.com/glossary.shtml
[3] American Document Management, Glossary of Terms, http://www.amdoc.com/glossary.shtml
[4] Kroll Ontrack, Glossary of Terms, http://www.krollontrack.com/glossaryterms

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