Bag A Free Car Radio Upgrade

Let's not beat about the bush. Fancy a free digital radio upgrade for your car?
Why? Because digital radio's the way to go. One day soon, FM will go the way of analogue TV, teletext and the N64. The future is DAB radio.
So make yourself futureproof. We're dishing out free digtal radio convertors for your car. It gets you every digital radio station in your car, plus Bluetooth for music and hands free calls, without intruding on your current set-up.
This week, it's an AutoDAB GO+ up for grabs. Upgrades your existing FM car radio into a DAB and DAB+, all through a shiny touchscreen that you'll make grubby with your fingers. Not too shabby. Here's a picture of it and all.
Scribble your name below to get your name in the hat.
Or - tap here, scribble your postcode and you'll get a little map of all the places nearby that can update your car radio to digital.
QUESTION: What does "DAB" radio stand for?