
Hedy Lamarr is perhaps best known for her film career, but the contributions she made to wireless interlinking during WWII are too great to ignore.
Lamarr invented between movies, and one of her greatest successes was a radio guidance system meant for U.S. torpedoes in WWII, to guide them remotely in a way that couldn’t be detected by the enemy. The idea wasn’t used then; the navy didn’t integrate the technology until the 1960s.
However, now, Lamarr’s spread-spectrum techniques are used as the basis for Bluetooth connections, and some Wi-Fi versions use eerily similar methods as well.