FedEx invented the express overnight parcel delivery business back in 1973 and remains the industry leader. With $60 billion in annual revenue and $49 billion in assets, it now operates in almost every country in the world. It transports mostly small parcels and envelopes by air and ground, mostly on a next-day-delivery basis but also offers less urgent delivery and delivers larger packages and freight as well. FedEx has about 400,000 employees and contractors.