Navistar International is a holding company manufacturing commercial and military trucks, diesel engines, and school and commercial buses. It operates in 3 industry segments: Truck, Parts, and Financial Services. The Truck segment manufactures and distributes Class 4 through 8 trucks and buses, produces proprietary diesel engines, and engages in truck export business under the International and IC Bus brands. The Parts segment provides truck, trailer, and engine service parts, and other proprietary standard products that support the International commercial truck, IC Bus, proprietary engine lines, and export parts business, as well as other product lines. The Financial Services segment provides and manages wholesale, retail, and lease financing of products sold by the Truck and Parts segments and their dealers.