This enumerated field identifies which category of physical entity the inventory/identity record for an embedded management controller (a server's CIMC, a chassis's CMC, or an IOM controller)'s vendor/model/serial/guid fields actually describe. Because the same Controller object shape is reused for CIMCs on blade/rack servers, CMCs on chassis, and IOM controllers, this field is what tells an admin (or a script walking every Controller row in the domain) which kind of hardware each particular row belongs to. Example values distinguish a server's CIMC controller from a chassis's CMC controller or an I/O module's controller.