What's the "A" in A-GPS?

You’ve probably seen the A-GPS specification on your location aware smartphone. You know that GPS (Global Positioning System) is a way to determine your location using information from satellites. But, what does the “A” part of A-GPS indicate? The “A” stands for “Assisted”. And, it indicates that your phone has other methods to determine your location in addition to satellite based GPS technology. These “other” methods involve triangulation of signals from cell towers and WiFi access points.