Hedy Lamarr was not only a glamorous Hollywood actress but also a brilliant inventor who, along with composer George Antheil, developed a frequency-hopping spread-spectrum communication system. This invention was created during World War II to make radio-guided torpedoes more difficult for enemies to detect and jam.

Decades later, the principles of their invention became the foundation for modern wireless technologies. The concept of frequency hopping is now a cornerstone of many communication systems, including:

- Wi-Fi
- Bluetooth
- GPS
- Cellular phones

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