A number of ships and/or aircraft, normally a subdivision of a force, assigned for a specific purpose.

A set of tasks assigned a common symbolic name, for addressing purposes.

A collection of Students assigned to a specific Manager. Groups are simply a mechanism to organize sets of Students. Students cannot belong to more than one group.

The competitors who are assigned to play a round together for the purpose of verifying scores and proper play in accordance with the rules.

Associative entity that combines administrators so that they can be assigned roles and constrained roles.