Sensor and actuator swarms, which can be wirelessly interconnected and combined with cloud-based services and applications on handheld devices, offer an unprecedented ability to monitor and act on a range of evolving physical quantities. Sensor and actuator-based systems have been proposed and deployed for a broad range of applications, but the potential goes far beyond what has been accomplished so far. When realized in full, these technologies can integrate the cyber world (centered today in the cloud) with our physical/biological world. This can enable humans, machines and infrastructure that are far more aware and adaptive to their environment. Just as today much of our data resides “in the cloud,” tomorrow much of our physical world will have a presence “in the swarm.” From the perspective of the information world, this revolution gives the information network eyes, ears, hands, and feet to interact with the physical world. From the perspective of the physical and biological world, this revolution enables coordination, intelligence, and efficient use of resources. This workshop will bring together world-class experts on the enabling technology, potential applications, and risks of swarm technologies.