Airtime is an awesome piece of software, built by Sourcefabric, which lets radio stations take control of programming via the web. It includes a simple scheduling calendar, smart playlists and automated playout. To mark World Radio Day 2013, FrontlineSMS:Radio's Amy O'Donnell wrote a post for Sourcefabric's blog on how this scheduling tool can be complemented by channels including SMS to help to make radio interactive. A snippet of the post is republished below, or you can read the original post in full here.