A developed country is a country that is industrialized, has transportation, and has the business facilities to advance the production of manufactured goods.
The U.S.A. is an example of a developed country. It is industrialized and has business facilities for the production of goods. It exports things such as machinery and equipment, industrial supplies, non-auto consumer goods, motor vehicles and parts, aircraft and parts, food, feed and beverages. It has public transportation in the form of buses and taxis.