Which of the following is NOT a classification level?

The classification levels typically recognized within the context of classified information are Top Secret, Secret, and Confidential. These categories are established to protect national security information by ensuring that only individuals with the appropriate security clearance can access it.

Top Secret is the highest level, reserved for information that, if disclosed, could cause exceptionally grave damage to national security. Secret is the next level down, intended for information that could cause serious damage if revealed. Confidential is the lowest of the three formal classification levels, for information that would cause damage to national security if released but is less sensitive than Secret information.

On the other hand, "Private" is not recognized as a formal classification level within the context of government and military classification systems. Instead, it is often used in non-classified contexts to denote personal or sensitive information that does not fit within the national security classification framework. Thus, this term does not hold the same weight or recognition as the established classification levels for protecting national security information.