"Digital Restrictions Management is the practice of imposing technological restrictions that control what users can do with digital media. When a program is designed to prevent you from copying or sharing a song, reading an ebook on another device, or playing a single-player game without an Internet connection, you are being restricted by DRM. In other words, DRM creates a damaged good; it prevents you from doing what would be possible without it. This concentrates control over production and distribution of media, giving DRM peddlers the power to carry out massive digital book burnings and conduct large scale surveillance over people's media viewing habits."

What is DRM? | Defective by Design
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