What does TRI-TAC stand for?

Joint Army, Navy, Air Force Tactical Communications System (MLEX)

Joint Tactical Command, Control, and Communications Agency (SAUS)

Joint Tactical Communications Program - Military (DOMA)

Tri-services Tactical Communications - Military technology (DDF)

Tri-service Tactical Communications (SAUS)

Tri-Service Tactical Communications Program - U.S. Department of Defense (MLEX)