You can create a sub site for various categories. For example:

* 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