What system automates record-keeping for security clearances and suitability determinations?

The correct choice is the Case Adjudication Tracking System (CATS). This system is specifically designed to streamline and automate the process of record-keeping for security clearances and suitability determinations within the Department of Defense and related agencies. CATS helps manage cases as they undergo adjudication, ensuring that all data, decisions, and documentation related to personnel security are efficiently tracked and updated.

CATS plays a crucial role in maintaining the integrity and accuracy of security clearance decisions by providing a centralized database where information can be easily accessed and managed. This enhances the overall effectiveness and efficiency of the clearance process, contributing to national security efforts.

While the other options may relate to personnel management or security, they do not focus specifically on automating the record-keeping aspect related to security clearances and suitability determinations like CATS does. For example, the Defense Information Security System (DISS) serves a broader function involving the management of security clearance processes but does not specifically target the adjudication tracking. The Security Clearance System is not recognized as a formalized system like CATS and Personnel Management Information System primarily deals with broader personnel data rather than specialized security clearance tracking.