Digital HDTV Grand Alliance – (a.k.a. Grand Alliance, Digital Grand Alliance) - Formed in May 1993, the Grand Alliance was/is comprised of a number of American entities.  Its aim was to produce "the best of the best" initially proposed HDTV systems. The participants were: AT&T, General Instrument Corporation, MIT, Philips Consumer Electronics, Zenith Electronics Corporation, David Sarnoff Research Center and Thomson Consumer Electronics. The format the Grand Alliance proposed is known as the ATSC format.

See the Interactive Television Institute.