The modern giant screen film industry was built by educational institutions and world's fairs. After the 15/70 film process was introduced in 1970 by Imax Corp. at the Osaka World Expo, a network of 200-some permanent large-format theatres grew up over the subsequent 25 years in science centers and museums. Imax competitors sprang up along the way, such as Iwerks Entertainment, MegaSystems, and Christie. In keeping with the needs of educational exhibitors, most films in the large-format ...

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