typedef enum _CONFIGURATION_TYPE
{
         ArcSystem = 0,
         CentralProcessor = 1,
         FloatingPointProcessor = 2,
         PrimaryIcache = 3,
         PrimaryDcache = 4,
         SecondaryIcache = 5,
         SecondaryDcache = 6,
         SecondaryCache = 7,
         EisaAdapter = 8,
         TcAdapter = 9,
         ScsiAdapter = 10,
         DtiAdapter = 11,
         MultiFunctionAdapter = 12,
         DiskController = 13,
         TapeController = 14,
         CdromController = 15,
         WormController = 16,
         SerialController = 17,
         NetworkController = 18,
         DisplayController = 19,
         ParallelController = 20,
         PointerController = 21,
         KeyboardController = 22,
         AudioController = 23,
         OtherController = 24,
         DiskPeripheral = 25,
         FloppyDiskPeripheral = 26,
         TapePeripheral = 27,
         ModemPeripheral = 28,
         MonitorPeripheral = 29,
         PrinterPeripheral = 30,
         PointerPeripheral = 31,
         KeyboardPeripheral = 32,
         TerminalPeripheral = 33,
         OtherPeripheral = 34,
         LinePeripheral = 35,
         NetworkPeripheral = 36,
         SystemMemory = 37,
         DockingInformation = 38,
         RealModeIrqRoutingTable = 39,
         RealModePCIEnumeration = 40,
         MaximumType = 41
} CONFIGURATION_TYPE;

Windows Vista Kernel Structures