All Digiboxes run on OpenTV (the latest HD boxes now use what is known internally as Project Darwin software) with Sky's EPG software and NDS VideoGuard conditional access. The Digibox receives software updates over the air, even when in standby mode should an update be available. The software features Sky-controlled channel numbering, the ability to view OpenTV or WapTV applications provided as "interactive" or "teletext" content on channels (with the full-Intenet style service available at first via Open... and later Sky Active), parental controls, the ability to order PPV events and some basic control over lists of favorite channels and show reminders.