It's 10 p.m. want to know where your children are?

• Author: Pogue, David
• Position: Global Positioning System usage - Brief article

Let's face it; we're in love with the idea of secret location trackers. In The Da Vinci Code, the bad guys slap a location tracking button onto Tom Hanks's clothing. In The Matrix, a location-tracking robot crawls into Keanu Reeves's abdomen. Many parents may have dreamed of equipping their kids with such tracking devices, to find out instantly where they are at all times. Now, there is one sci-fi gadget that's no longer fi, thanks to advanced sci--satellite-based tracking using Global Positioning...