System Wide Information Management (SWIM) facilitates the data sharing requirements for NextGen, providing it's digital data-sharing backbone. SWIM enables increased common situational awareness and improved NAS agility to deliver the right information to the right people at the right time. This information-sharing platform offers a single point of access for aviation data, with producers of data publishing it once, and users accessing the information they need through a single connection.
U.S. Department of Transportation
What is SWIM? 
Delivering NextGen: Kevin Hatton 
How Does the National Airspace System (NAS) Work 
System Wide Information Management (SWIM) 
FAA System Command Center