Digital rights management (DRM) refers to technical means to control operations that may be performed on data. For example, a DRM policy might be that a file must not be copiable, or must only be read by a particular person, or that all copies must be deleted after a period of time. When the policy is solely about who has access to the data and not about what can be done with the data, see access-control.
DRM usually specifically refers to restrictions that apply to content covered by copyright, such as music, videos, etc. DRM also applies to application code; see also license-enforcement.