Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Functions (hierarchy name)
4. functions (activities)
5. [functions by general context]
6. information handling functions
7. computer-use functions

Anotations

Scope note:

The representation of the behavior or characteristics of one system through the use of another system, especially a computer model; often used to forecast or predict the behavior of a dynamic system when real world experimentation is not feasible.