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:

Calculating machines, now historic, that were able to produce tables of values for arithmetic functions. The machine was designed by English inventor and engineer Charles Babbage in 1822, and a working model was built in 1853 by George and Edward Scheutz.