Security control equipment and systems are designed specifically to curtail or minimize risks to properties, employees and computer systems. Security control equipment and systems include alarm systems, metal detectors, both handheld and walk through, explosive detectors, burglar alarms, access control gates, razor wire, baggage and mail screening machines and electronic guard monitoring systems among others. Security control equipment and systems manage essential services including electricity, petroleum production, water, transportation, manufacturing, and communications. Security control systems rely on computers, networks, operating systems, applications, and programmable controllers.