DRM and documents
Enterprise digital rights management (E-DRM or ERM) is the application of DRM technology to the control of access to corporate documents such as Microsoft Word, PDF, and AutoCAD files, emails, and intranet web pages rather than to the control of consumer media . E-DRM is generally intended to prevent the unauthorized use (such as industrial or corporate espionage or inadvertent release) of proprietary documents. E-DRM typically integrates with content management system software. An example of an E-DRM system is Microsoft’s Rights Management Services. Additional E-DRM vendors include Adobe Systems and EMC Corporation.
Source : wikipedia