Navistar International Corporation is a global industrial powerhouse, specializing in the production and distribution of commercial trucks, diesel engines, school buses, commercial buses, and related service parts. Its comprehensive operations are structured across four key segments: Truck, Parts, Global Operations, and Financial Services. Under its well-known International and IC brands, Navistar designs, engineers, manufactures, and distributes a wide array of Class 4 through 8 trucks and buses.