Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Tools and Equipment (hierarchy name)
5. equipment
6. [equipment by process]
7. data processing equipment
8. [temporary alphabetical list: data processing equipment]

Anotations

Scope note:

Devices that decode data; may also be devices with any number of input lines that carry signals and output lines with up to one carrying a signal, creating a one-to-one correspondence between output and input signals.