United Parcel Service, Inc. (UPS) is an American multinational shipping & receiving and supply chain management company founded in 1907. Originally known as the American Messenger Company specializing in telegraphs, UPS has expanded to become a Fortune 500 company and one of the world's largest shipping couriers. UPS today is primarily known for its ground shipping services as well as the UPS Store, a retail chain which assists UPS shipments and provides tools for small businesses. UPS offers air shipping on an overnight or two-day basis and delivers to post office boxes through UPS Mail Innovations and UPS SurePost, two services that pass on packages to the United States Postal Service for last-mile delivery.

Package delivery or parcel delivery is the delivery of shipping containers, parcels, or high-value mail as single shipments. The service is provided by most postal systems, express mail, private courier companies, and less-than-truckload shipping carriers. Package delivery is different in each country, and how packages are delivered is closely connected with the cost for delivering to that country as well as population. In 2019, China, The United States, and Japan were the leaders in package delivery while Latvia, Macau, and Iceland were the bottom three. The population of the bottom three barely totals 2 million while the population of the top three tops totals more than 2 billion. Package delivery is an every day occurrence in the US while many other countries do not have this luxury.