ACM MobiCom 2013, the Annual International Conference on Mobile Computing and Networking, is the nineteenth in a series of annual conferences sponsored by ACM SIGMOBILE dedicated to addressing the challenges in the areas of mobile computing and wireless and mobile networking. The MobiCom conference series serves as a highly selective, premier international forum addressing networks, systems, algorithms, and applications that support mobile computers and wireless networks. In addition to the regular conference program, MobiCom 2013 will include a set of workshops, panels, research demonstrations, and a poster session that includes the ACM Student Research Competition. This year, MobiCom will also be introducing a new mobile app competition and a new session of invited industry presentations.The conference will be held in Miami, Florida, September 30-October 4, 2013.