PHILADELPHIA (CNN) -- It's an exhilarating feeling we can all relate to -- FedEx notifying you that your package has been delivered. But before you mindlessly click on that text message that looks ...

Just send a quick direct message to trackthis and we'll send you a direct message any time your package location changes. Depending on how your account is set up, you can get the updates for your ...

Just how does FedEx track millions of packages -- and can the same technology be adapted, as Gov. Christie said over the weekend, to track visitors who overstay their visas? "If FedEx can do it, why ...