LITTLETON, N.H. -- It's no stretch to say computers are helping to change people's lives. Certainly one man from New Hampshire will attest to that -- a tiny computer has given him the ability to walk again.

His name is Mark Driscoll from Littleton, N.H. About three years ago, he lost the lower part of his left leg in a freak accident on Interstate 93. But life for Mark is basically back to normal, thanks to what's called the computer leg, or C-Leg for short. It is one very high-tech prosthetic.

"It just feels great. I mean the stability is just incredible, I knew that the first time I put it on," Driscoll says.

Since discarding his original prosthetic and putting the C-Leg on last summer, Driscoll steps confidently.

"Before you just felt like you were going to fall all the time. Going down ramps you'd have to stiff leg it down, now you just walk," he says.

Driscoll is the first person in northern New England to try this finely tuned technology which is manufactured in Minnesota. The C-Leg is made of lightweight-high strength titanium and carbon fibers, but what sets this artificial leg apart --- the sophisticated on board computer which literally tells the leg how to react to each and every step.

"It really eliminates the need for the patient to be second guessing what his knee is about to do, it follows through with his intentions," says prosthetic specialist Dr. Dick Roy.

Once, maybe twice a year, Driscoll sees prosthetic specialist Dr. Roy, who tweaks the leg ensuring it compensates correctly for Driscoll's weight. In essence, the computer works as a brain. Sensors in the knee and shin send signals to a microprocessor which anticipates every movement Driscoll could possibly make.

"The information coming from the sensors to the microprocessor is interpreted 50 times every second," says Dr. Roy.

All science aside, Driscoll revels in the fact he is back to living what he calls a full life. An avid north country outdoorsman, he's once again hiking, snowmobiling, fishing, coaching soccer, building a new camp and not to mention...

"Dancing was another thing that was limited but my wife has me back on the dance floor so we dance," Dricsoll says. "So that's a big hurdle."

As you might guess, the C-Legs aren't cheap. They cost between $40,000 and $50,000 and Driscoll's insurance company still has not agreed to pay the full bill. But ask Driscoll who's life was first dramatically changed three-years ago, what ever the cost, this state of the art prosthetic is nothing short of priceless.

"Knowing I can do my everyday tasks as a dad, a husband, an employer has just changed my life," Driscoll says. 

Over the last eight months since getting the C-Leg, Driscoll has heard many comparisons to the old TV show "The $6 million man." It turns out it wasn't that far off.