CONSTRAINTS
-The threat or use of force to prevent, restrict, or dictate the action or thought of others.

-The state of being restricted or confined within prescribed bounds

-One that restricts, limits, or regulates


BOUNDARY

-something that indicates bounds or limits; a limiting or bounding line.

-the greatest possible degree of something


INTERFACES

-A surface forming a common boundary between adjacent regions, bodies, substances, or phases.
-A point at which independent systems or diverse groups interact


INTERRELATIONS

-mutual or reciprocal relation or relatedness