Since its original creation in the 1970s, GPS has evolved from a technology primarily used by the military to a foundation for modern society. 
After the removal of selective availability for civilians in 2000, GPS’s value has significantly expanded. In the past two decades, nearly every critical infrastructure sector–telecommunications, transportation, energy, agriculture, emergency services, and financial services–relies on GPS constellations to ensure that timing and location accuracy are precise. Though many do not see its utility in day-to-day efforts, GPS has become entrenched in modern networks and services.
Key sources:
<ul>
 <li>
<a href="https://clintonwhitehouse5.archives.gov/WH/new/html/20000501_2.html">Removal of selective availability.</a>
</li>
 <li>
<a href="https://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/gps/howitworks">Satellite Navigation - GPS - How It Works.</a>
</li>
 <li>
<a href="https://www.gps.gov/what-can-gps-do">What can GPS do?</a>
</li>
</ul>
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GPS: A backbone for critical infrastructure. [T-Minus: Space-Cyber Briefing]

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