FedEx Corporation is a Delaware corporation, incorporated October 2, 1997. FDX Corporation was founded in January 1998 with the acquisition of Caliber System Inc. by Federal Express. With the purchase of Caliber, FedEx started offering other services besides express shipping. Caliber subsidiaries included RPS, a small-package ground service; Roberts Express, an expedited shipping provider; Viking Freight, a regional, less than truckload freight carrier serving the Western United States; Caribbean Transportation Services, a provider of airfreight forwarding between the United States and the Caribbean; and Caliber Logistics and Caliber Technology, providers of logistics and technology solutions. FDX Corporation was founded to oversee all of the operations of those companies and its original air division, Federal Express.