1.Mobile phone(telefon komórkowy):
A mobile phone or mobile is an electronic device used for mobile telecommunications.
Mobile phones differ from cordless telephones, which only offer phone service within limited range.
A mobile phone or mobile is an electronic device used for mobile telecommunications over a cellular network of specialized base stations known as cell sites.
2.GPS(Globalny System Nawigacji)
GPS is a U.S. space based global navigation satellite system. It provides reliable positioning, navigation, and timing services to worldwide users on a continuous basis in all weather, day and night. anywhere on or near the Earth which has an unobstructed view of four or more GPS satellites.The design of GPS is based partly on similar ground-based radio navigation systems, such as LORAN and the Decca Navigator developed in the 1940s, and used during World War II. In 1956 Friedwardt Winterberg proposed a test of General Relativity using accurate atomic clocks placed in orbit in satellites.