[CL] quotes [Chin Huang]:  "The Running Object Table (ROT) is a globally accessible table listing           
objects running on the system.  This table only lists the applications          
that registered themselves in the table, but the major [Windows]                  
applications do so."  Part of the point is that ROT enumerates what's visible to [tcom].

Example code for introspection on the ROT appears at
http://www.alexfedotov.com/samples/enumrot.asp .

CL has been thinking about how it'd be nice if tcom knew to do the same ...