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. analog computers
9. analog data processors

Anotations

Scope note:

Devices that indicate the total amount or average value of a quantity; in analog computing these may be devices whose output functions are proportional to the integral of their input functions, with respect to specific variables.