Ansys Government Initiatives (AGI, formerly known as Analytical Graphics) is a technology company that specializes in engineering simulation. Its products include Systems Tool Kit (STK), modeling and simulation software for digital mission engineering and systems analysis; Orbit Determination Tool Kit (ODTK), which processes tracking data and generates orbit ephemeris; etc. The software is applicable for defense, air systems, space operations, geospatial analytics, hypersonics, communications, and other missions.