Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication (hierarchy name)
4. Information Forms (hierarchy name)
5. information forms (objects)
6. information artifacts
7. [information artifacts by physical form]
8. machine-readable artifacts
9. optical disks

Narrower term/s

• DVD-ROMs

Anotations

Scope note:

Optical disks used primarily for storing video and data; they are the same size as compact discs, but designed to hold approximately seven times more digital information, including multiple layers. DVDs are generally one-sided, and hold 4.7 gigabytes of information.