IUS meaning in Governmental ?

Answer: What is Inertial Upper Stage mean?

The Inertial Upper Stage (IUS), originally designated the Interim Upper Stage, was a two-stage, solid-fueled space launch system developed by Boeing for the United States Air Force beginning in 1976 for raising payloads from low Earth orbit to higher orbits or interplanetary trajectories following launch aboard a Titan 34D or Titan IV rocket as its upper stage, or from the payload bay of the Space Shuttle as a space tug.

reference

Full Form	Category
Indiana University Southeast	Academic & Science
Union Internationale de Spéléologie	Academic & Science
International Union of Speleology	Academic & Science
International Ultrasonics Symposium	Community
Integrated Utility Services	Computing
Interchange Unit Separator	Computing
Involuntary Uniform Syndrome	General
Inertial Upper Stage	Governmental
Improved Unarmed Strike	Governmental
Interim Use Sheet	Governmental
Inter-University Seminar	Governmental
Intra-Uterine System	Medical
Inus, Papua New Guinea	Regional