Final answer:
GPS was developed by the U.S. Department of Defense and is critical for global navigation, with widespread commercial and economic significance.
Step-by-step explanation:
The GPS (Global Positioning System) was developed by the U.S.
Department of Defense as a worldwide navigation system.
This advanced technology, which began as a military asset, utilizes a constellation of satellites and has been incorporated into many commercial products, such as cell phones and car navigation systems.
The United States continues to invest significantly in maintaining the GPS infrastructure, recognizing its critical importance to the economy and everyday life.