Code 3
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Code 3 is usually used to either describe a set of model cars and trucks that were customized by the person making the model, or a mode of response for emergency vehicles.
- Code 3 Collectibles, a scale model company.
- Code 3 Response, a response mode for emergency vehicles.
- Code 3 Public Safety Equipment, a manufacturer of emergency vehicle warning devices.
- Code-3 temporal pattern, a distinct evacuation tone pattern used primarially in fire alarms