In 1935, Hedy Lamarr, an Austrian-American actress and inventor, alongside composer George Antheil, developed a pioneering technology called frequency hopping. Designed to thwart signal jamming, the system changed frequencies and was initially intended for military use. This innovation became foundational for modern technologies, like Wi-Fi and Bluetooth. While her contributions were recognized posthumously, Lamarr's work significantly advanced global telecommunication and connectivity.