HSAS meaning in Governmental ?

Answer: What is Homeland Security Advisory System mean?

In the United States, the Homeland Security Advisory System was a color-coded terrorism threat advisory scale. The different levels triggered specific actions by federal agencies and state and local governments, and they affected the level of security at some airports and other public facilities. It was often called the "terror alert level" by the U.S. media. The system was replaced on April 27, 2011, with a new system called the National Terrorism Advisory System.

reference

Full Form	Category
High School of American Studies	Community
High Speed Access Services	Computing
Hagar Schon Aaronson Shrieve	General
Homeland Security Advisory System	Governmental