Paccar Inc., holds the position as a fourth largest company in 2011-12, manufacturing heavy-duty and medium trucks for various services. They even contribute a lot in manufacturing medium and light-weight vehicles across all their subsidiary units. The company manufactures commercial vehicles under the banner of Peterbilt, DAF and Kenworth. They have even achieved their target to manufacture 30 percent greater efficiency in utilizing vehicle fuel for several selected section of medium-duty applications. Their hybrid technology is a major contribution in modern engineering. William Pigott, Sr., established the company in 1905 as the Seattle Car Manufacturing Company. They even manufactured Sherman tanks for the army of the United States during Second World War.