FDA = FOOD and DRUG

I've always thought the FDA was for regulating food and drugs. It existed to make sure that I don't eat too many bug parts with my cereal, and to make sure that drug X does what its suppose to. However, according to an article on the Segway not being allowed in Disney resorts, it is now in charge of regulating transportation devices.

"Disney World doesn't allow the Segways into the parks because they haven't been approved by the Food and Drug Administration as medical devices, said park spokeswoman Jacquee Polak."

Why is the FDA regulating medical devices? Okay, maybe I can buy equipment used in hospitals, but why Scooters? Do we really need to pay people to say, yes, the Segway helps people who can stand, but can't walk distances get around in public?