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. recordings
9. sound recordings
10. phonograph records

Anotations

Scope note:

Phonograph records played at 78 revolutions-per-minute, the standard playing speed for records until the mid-20th century. The maximum length of play per side was 4 1/2 minutes, and they appeared most commonly in ten-inch and twelve-inch formats.