Is this a whole-part design pattern?

I have to explain a pattern based on some text, but I'm not sure what the real name of this pattern is. According to this text it called "The Part" and its purpose is the generalization of the concept like that of a person physical and/or organizational

• Individual:

  • Internal: Employees, Shareholders
  • External: customers, suppliers, debtors, creditors, etc.

• Organization:

• Internal: Managers, departments, sections
• External: customers, suppliers, debtors, etc.

(Each classification can be subclassified)

Is there a specific name for this pattern? Or if it doesn't have a name, is there any real life example I could use for reference?

Thanks in advance