Radios: 575 million (1997)
Television broadcast stations: more than 1,500 (including nearly 1,000 stations affiliated with the five major networks - NBC, ABC, CBS, FOX, and PBS; in addition, there are about 9,000 cable TV systems) (1997)
Televisions: 219 million (1997)
Internet country code: .us
Internet Service Providers (ISPs): 7,800 (2000 est.)
Internet users: 166 million (2001)
Transportation United States
Railways: total: 212,433 km mainline routes standard gauge: 212,433 km 1.435-m gauge note: represents the aggregate length of roadway of all line-haul railroads including an estimate for Class II and III railroads (1998)
Highways: total: 6,370,031 km paved: 5,733,028 km (including 74,091 km of expressways) unpaved: 637,003 km (1997)
Waterways: 41,009 km note: navigable inland channels, exclusive of the
Great Lakes