+A [Security Device](/wiki/security_device) is any mechanism engineered to safeguard assets, premises, or data from unauthorized intrusion or damage. It functions as a deterrent, detection, or defensive measure, establishing a protective layer against [Threat](/wiki/threat) and enhancing overall [Safety](/wiki/safety).
+## See also
+- [Access Control](/wiki/access_control)
+- [Alarm System](/wiki/alarm_system)
+- [Protection](/wiki/protection)
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