Use ComputerCategory to improve the overview. It is possible to use the ComputerCategory both as a framing object on a diagram and as an object containing links in a standard list view.
To use the object as a graphical framing object place it on an InfraStructureDiagram and place Computer objects inside the frame.
To use the object in a non-graphical manner, open the object and insert links to Computer objects in the Computers field.