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Warning system is any system of biological or technical nature deployed by an individual or group to inform of a future danger. Its purpose is to enable the deployer of the warning system to prepare for the danger and act accordingly to mitigate or avoid it.
Contents
Biological warning systems
Man-made warning systems
Civilian warning systems
Military warning systems
Historical beacon-based systems:
Space based missile early warning systems:
Airborne early warning systems:
Ground based early warning radar systems:
Optical sensors:
Emergency broadcasting:
References
Warning system Wikipedia(Text) CC BY-SA