Hardware restrictions

Phase Alternating Line (PAL) is a colour encoding system for analog television. It was one of three major analogue colour television standards, the others being NTSC and SECAM. In most countries it was broadcast at 625 lines, 50 fields (25 frames) per second, and associated with CCIR analogue broadcast television systems B, D, G, H, I or K. The articles on analog broadcast television systems further describe frame rates, image resolution, and audio modulation.

The Digital Millennium Copyright Act (DMCA) is a 1998 United States copyright law that implements two 1996 treaties of the World Intellectual Property Organization (WIPO). It criminalizes production and dissemination of technology, devices, or services intended to circumvent measures that control access to copyrighted works (commonly known as digital rights management or DRM). It also criminalizes the act of circumventing an access control, whether or not there is actual infringement of copyright itself. In addition, the DMCA heightens the penalties for copyright infringement on the Internet. Passed on October 12, 1998, by a unanimous vote in the United States Senate and signed into law by President Bill Clinton on October 28, 1998, the DMCA amended Title 17 of the United States Code to extend the reach of copyright, while limiting the liability of the providers of online services for copyright infringement by their users.

DVD region codes are a digital rights management technique introduced in 1997. It is designed to allow rights holders to control the international distribution of a DVD release, including its content, release date, and price, all according to the appropriate region.

Defective by Design (DBD) is a grassroots anti-digital rights management (DRM) initiative by the Free Software Foundation (FSF) and CivicActions. Launched in 2006, DBD believes that DRM (which they call "digital restrictions management") makes technology deliberately defective, negatively affects digital freedoms, and is "a threat to innovation in media, the privacy of readers, and freedom for computer users." The initiative regularly campaigns against the use of DRM by the media industry and software industry to increase awareness of the anti-DRM movement and pressure industries into no longer using DRM. They are known for their use of hazmat suits in their demonstrations.