IMAX - Wikipedia

IMAX is a system of high-resolution cameras, film formats and film projectors.Graeme Ferguson, Roman Kroitor, Robert Kerr, and William C. Shaw developed the first IMAX cinema projection standards in the late 1960s and early 1970s in Canada. Unlike conventional projectors, the film runs horizontally (see diagram sprocket holes) so that the image width is greater than the width of the film.