Using software / encryption to turn information "objects" (files) into property.
CoryDoctorow against : http://www.commonhouse.net/wiki/drm/DRM_20systems_20are_20bad_20for_20artists
An example, seems to come from an educational perspective :
Why that's probably bad :
And talks about MyBank supports digital supply chains where you buy what you need it when you use it.
So see also : SoftwareSupplyChain
MicroSoft's is WMA (OnMicrosoft/PlatformWars)
See also :