a United States Space Force satellite constellation that provides the United States with military communications to support globally distributed military users.

an office within the United States Department of Homeland Security charged with enabling national security and emergency preparedness communications (NS/EP telecommunications) using the national telecommunications system.

The Joint Worldwide Intelligence Communication System is the United States Department of Defense's secure intranet system that houses top secret and sensitive compartmented information.

a network of single sideband shortwave transmitters of the United States Air Force which is used to communicate with aircraft in flight, ground stations and some United States Navy surface assets.