Device Family
A DeviceFamily object is a collection of hardware IDs that are cached in the data store under a common name. DeviceFamily is useful for treating a large number of devices that have different hardware IDs as one device to test in parallel. For example, a video-card manufacturer might have 100 different video cards (with different hardware IDs) that all have essentially the same functionality.
Note
Hardware IDs that are added to a DeviceFamily must match the hardware IDs that Windows® reports for a device.