| Word | Description |
| Selective Availability (SA) | Selective Availability is a way that the US Government has to scramble certain portions of GPS positions to "fuzz" or render less accurate the locations obtained from the satellites. The intent of SA was to allow the US to decrease the accuracy for non-military applications during a time of war. The existence of SA has been a sufficient reason to cause the EU to create the Galileo system of global positioning satellites. SA was turned off by President George H W Bush during the first Iraq War in the early 1990s in order to allow the use of plentiful civilian GPS receivers for military applications. It was subsequently turned off by President William J Clinton on May 1, 2000 in a move to increase usefulness in the civilian sector. In 2007, President George W Bush removed the SA requirement from satellite procurement, thus effectively putting a permanent end to SA in the US system. |