You can create a sub site for various categories.
* Departments - finance, marketing, IT
* Products - electrical, mechanical, hydraulics
* Projects - Trey Research, Department of Transportation, FDA
* Team -Retention team, BPR team
* Clients - new clients, old clients
* Suppliers - Supplier 1,Supplier 2, Supplier 3
* Customers - Customer A, Customer B, Customer C
* Real estate - property A, property B
The URLs for each will be, for example:
You can keep track of permissions for each team separately so that access is restricted while vabnix.page.tl maintaining global access to the parent site.