OpenSkies by Cybernet Systems Corporation is a comprehensive software product designed for simulation, training, and networking purposes. It provides a virtual air traffic control environment for training air traffic controllers, and also serves as a networking system interoperable with High Level Architecture (HLA). This system enables over 100,000 clients to interact in real time within a common object space. OpenSkies is provided as a software development kit (SDK) that allows developers to create new applications or retrofit existing ones, ensuring compatibility with Defense Department standards. It supports virtually unlimited play locations and player numbers, with network performance suitable for demanding applications such as first-person shooter games or command and control situations.