What is DRM?

Following DeffectiveByDesign’s campaign to show the world what really is DRM when someone search it on google, I’m adding the link below to explain the world what really is DRM. Please, add the link below with DRM as description to any page you have the access to write (and won’t cost you your job):

http://www.defectivebydesign.org/what_is_drm like this: DRM

Read more about it here.