Interested in the Internet of Things? Sign up today for the AT&T Mobile App Hackathon (IoT) San Diego - Hack-o-ween. The event is sponsored by the AT&T Developer Program in association with CyberTECH. Collaborate with your peers to build an IoT or mobile Smart City app that uses datasets provided by the City of San Diego. Your app must help better serve citizens of San Diego. Scenarios to consider include First Responders, Public Health, Public Safety, Security, Traffic and Transportation, or related areas.