there are many but I assume that there arent any common groupings of them.
marketing groupings
A meter is the organization of beats into regular groupings.
Groupings of several pitches sounded simultaneously is called what?
A constellation.
What are Regional Economic groupings? Why did Regional Economic groupings emerge? Whats are the advantages and disadvantages?
biotas
A lot. Using facebook is not really restricted to any specific religious groupings.
hierarchy
Multicore states are states that have multiple large population groupings, and each of those groupings are about equal in economic importance
pairs
Solar and gravitational