What are restricted as to entrance or movement by all but authorized personnel and vehicles?

Controlled areas are secure zones that restrict access to authorized personnel and vehicles only. These areas may include military zones, secure corporate facilities, or sensitive operational spaces where access control is enforced through badges, guards, surveillance, or barriers.

Terminal operations (A) refers to logistical or transportation hubs.

Surveillance (B) is a monitoring method, not a restricted area itself.

Total programs (C) is not a recognized security term.