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

Narrower term/s

• albums (sound recordings)

Anotations

Scope note:

Phonograph records originally invented by Columbia Records, first introduced in 1948. The records have a rotational speed of 33 1/3 rpm (revolutions per minute), and have very fine grooves. They, along with 45 rpm records, replaced 78 rpm records in popularity.