From the link:
Technically, you’re already a cyborg. If you keep your cell phone with you most of the time, especially if the earpiece is in place, I think we can call that arrangement an exobrain. Don’t protest that your cellphone isn’t part of your body just because you can leave it in your other pants. If a cyborg can remove its digital eye and leave it on a shelf as a surveillance device, and I think we all agree that it can, then your cellphone qualifies as part of your body. In fact, one of the benefits of being a cyborg is that you can remove and upgrade parts easily. So don’t give me that “It’s not attached to me” argument. You’re already a cyborg. Deal with it.
Your regular brain uses your exobrain to outsource part of its memory, and perform other functions, such as GPS navigation, or searching the Internet. If you’re anything like me, your exobrain is with you 24-hours a day. It’s my only telephone device, and I even sleep next to it because it’s my alarm clock.
(Hat tip: the Daily Dish)