(The information in this topic contains file-specific information for the "General Import Procedure" covered in the "Importing CAD Data" topic.)
ACIS files come from the 3D ACIS Modeler, which is a CAD software package developed by Spatial Corporation (formerly Spatial Technology). You can import ACIS files up to v2016 1.0.
You can choose to import a .sat, .asat, or .sab file.