FedEx Ground, a subsidiary of the FedEx Corporation, is an American ground package delivery company headquartered in Moon Township, Pennsylvania, a suburb of Pittsburgh. The company began as Roadway Package System (RPS), founded in 1985 by transportation company Roadway Services Inc., later renamed Caliber System. FedEx bought Caliber in 1998 to complement its existing FedEx Express business and rebranded Caliber's RPS package delivery service FedEx Ground in 2000.

FedEx Corporation, formerly Federal Express Corporation and later FDX Corporation, is an American multinational conglomerate holding company focused on transportation, e-commerce and business services based in Memphis, Tennessee. The name "FedEx" is a syllabic abbreviation of the name of the company's original air division, Federal Express, which was used from 1973 until 2000. FedEx today is best known for its air delivery service, FedEx Express, which was one of the first major shipping companies to offer overnight delivery as a flagship service. Since then, FedEx also started FedEx Ground, FedEx Office, FedEx Supply Chain, FedEx Freight, and various other services across multiple subsidiaries, often meant to respond to its main competitor, UPS. The company is the fifth largest American-headquartered employer globally with 547,000 employees, and FedEx is also one of the top contractors of the US government and assists in the transport of some United States Postal Service packages through their Air Cargo Network contract.