More classes needed using get-wmiobject

Hi

I have been able to get some good information out using get-wmiobject, but I've run out of ideas.  Can anyone add to the list I have below to help me describe the machine.  Please note I want to describe what it is and not how it is being used at that point in time.  So for example total memory would be useful, but not memory being used or free memory.  I'm trying to think of more communication links or storage devices.  Anyway, the list i already have is:

1.   Processor
2.   PhysicalMemoryperformance
3.   Diskdrive
4.   USBhub
5.   Networkadapter
6.   Operatingsystem
7.   Diskpartition
8.   Videocontroller
9.   BIOS

Many thanks