Which of the following is NOT an example of an SCI control system?

The correct answer is not categorized as an SCI control system because it refers specifically to Special Access Programs (SAP), which are separate and distinct programs that impose additional access and handling restrictions beyond those of regular classified information. While SAPs do involve sensitive information and apply strict controls, they are not classified as Sensitive Compartmented Information (SCI) programs. SCI control systems, on the other hand, delineate various compartments that require specialized access permissions and are tightly linked to intelligence activities, providing enhanced measures to protect particularly sensitive information.

In contrast, the other choices represent recognized SCI control systems. The HCS (HUMINT Control System) supports human intelligence activities, KLODIKE serves as a compartment for specific intelligence needs, and COMINT (Communication Intelligence) relates to intercepting and analyzing communications. All of these are integrated within the framework of SCI, emphasizing the differentiated nature and security requirements that SAPs do not encompass.