IC Bus (formerly IC Corporation) is a builder of school buses in the United States. Founded in 2002, the company traces its roots back to Ward Body Works, which was established in 1933. IC produces bus bodies on an International chassis, as it is a wholly owned subsidiary of Navistar International Corporation. IC is an acronym for Integrated Coach, which alludes to the fact that the body, chassis, and engine are all built within the same corporate structure.