FNS assumes that each user is affiliated with an organizational unit of an enterprise. A user can be affiliated with multiple organizational units, but there must be one organizational unit that is primary, perhaps by its position in the organizational namespace or by the user's role in the organization.
NIS+. In an NIS+ namespace, this organizational unit corresponds to the user's home domain (which could be a subdomain).
NIS. In a NIS namespace, there is only one enterprise-level organizational unit which corresponds to the user's domain.
Files. In a files-based namespace, there is only one organizational unit, org// which maps to myorgunit.
The namespace identifier myorgunit (or _myorgunit) resolves in the initial context to the context of the primary organizational unit of the user making the request. For example, if the user making the request is jsmith, and jsmith's home domain is east.sales, then myorgunit resolves in the initial context to the organizational unit context for east.sales, and the name myorgunit/service/calendar resolves to the calendar service of east.sales.