For example, the virtual machine might only allow the code access to a certain set of functions or data.
"Each floor a different set of functions, the highest floors the most delicate."
The actual model is the set of functions that describe the relations between the different variables.
Each ring is considered a single module with a special set of functions.
The system itself can be described as a set of functions necessary for the overall purpose.
In the second round participants had to solve a problem using limited set of functions.
It has a very limited set of functions, but they should be sufficient for the purpose.
The hope is to create a recipe that works well for a particular set of functions.
Each provide access to a specific set of features and functions.
They are given access only to a set of functions, and not the memory on the stack itself.