What is National Industrial Security System (NISS)?

The National Industrial Security System (NISS) likely refers to the system (potentially software or a set of procedures) used to manage and maintain compliance with the National Industrial Security Program (NISP). The NISP establishes requirements for safeguarding classified information that is disclosed to or developed by U.S. contractors and licensees. A NISS would therefore be a system designed to help organizations manage aspects like personnel security clearances, facility security clearances, classified document control, and other elements necessary to meet NISP requirements. Its specific capabilities and use would vary depending on the specific implementation and the needs of the organization using it.