While there has been plenty of grumbling about digital rights management (DRM) software being attached to Windows Vista, this software primarily blocks users from burning copyright controlled DVDs.
Bear in mind that most music downloaded from iTunes will not work on cell phones because of DRM (digital rights management) protection.
Amazon music downloads are free of digital rights management, commonly referred to as DRM.
DRM actually had nothing to do with the trouble between Vista and Limewire.
DRM (digital rights management), resulting in AAC or .m4p files.
A condition equivalent to the above, and necessarily connected with it, is, that at each pair of points of contact the inclinations of the curves to their radii-vectores shall be equal and contrary; or, denoting by r1, rf the radii-vectores at any given pair of points of contact, and s the length of the equal arcs measured from a certain fixed pair of points of contact dri/ds= drm/ds; (18)