Mobile apps are becoming important parts of enterprise and mission-critical systems that make use of contextual information to optimize resource usage and drive business and operational processes. Mobile technology is also reaching people in the field across multiple domains to help with various tasks such as speech and image recognition, natural language processing, decision-making, and mission planning. Mobile apps and smartphones are only one instance of today's mobile computing technology. RFID tags, sensor nodes, and computing-enabled mobile devices are all components of the current mobile computing paradigm. These devices are being integrated into enterprise systems and mission-critical systems as a way to collect data in the field. Different from previous paradigms, data is no longer a discrete piece of information locally produced and distributed in servers; data is also produced, stored and used in the field, shared between mobile and resident devices, and potentially uploaded to local servers or the cloud — a distributed, heterogeneous, context-aware, data production and consumption paradigm. What this means from a systems and software engineering perspective is that mobile devices and sensors are being integrated into IT solutions and re-shaping the way that systems are built. We call these systems mobile-enabled systems. The goal of MOBS 2013 is to create a focal point and an ongoing forum for researchers and practitioners to share results and open issues in the area of software engineering of mobile-enabled systems.