IMAX is a proprietary cinema technology renowned for its massive screens, steep stadium seating, and a tall aspect ratio (about 1.43:1) that delivers an immersive, larger-than-life viewing experience. The company was co-founded in September 1967 in Canada by Graeme Ferguson, Roman Kroitor, Robert Kerr, and William C. Shaw, originally under the name Multiscreen Corporation. A key technical breakthrough was the "Rolling Loop" film-transport system invented by Australian Peter Ronald Wright Jones, which allowed film to run horizontally with 15 perforations per frame, enabling screens as large as 18 by 24 meters. To expand beyond costly purpose-built theaters, IMAX introduced the SR (1998) and MPX (2004) systems for existing cinemas, followed by fully digital IMAX Digital 2K (2008) and IMAX with Laser 4K (2014) retrofits. The iconic name "IMAX" was coined by the founders over lunch at a Hungarian restaurant in Montreal, derived from "maximum image," after they learned "Multivision" was too generic to trademark. A pivotal patent for the system was filed on January 16, 1970, under the original Multiscreen name, cementing the foundation of the format.