szczys writes: Hedy Lamarr is a household name for the wrong reason. Her name is known as a Hollywood actress, but her legacy is in your pocket and reaches far more people than her movies. She was a brilliant thinker who plied her skills during World War II, developing technology that could help to win the war. Her patent wasn't used at the time, but is a foundation of spread-spectrum which is used in the radio modules of your cellphone: WiFi, Bluetooth, GPS, and others. This frequency hopping concept sat unused for decades before being added to the most ubiquitous of wireless connectivity methods.