The Global Positioning System (GPS), a ubiquitous tool for navigation and location tracking, owes its existence to the United States military. During the Cold War, the US Department of Defense initiated the development of a satellite-based navigation system known as NAVSTAR GPS to provide precise positioning information to its troops.

The initial goal was to enhance military operations by enabling accurate targeting and communication in any location. This groundbreaking technology involved a network of orbiting satellites transmitting radio signals that could be intercepted and analyzed by receivers on the ground.

Over time, GPS technology evolved and became increasingly accessible to the public. Now, GPS plays a vital role in numerous civilian applications, including transportation, mapping, emergency response, and everyday life.

Prompt:
Describe a surprising technological advancement that was initially conceived for a completely different purpose.