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FSC Group 63: Alarm, Signal and Security Detection Systems

• 6310: Traffic and Transit Signal Systems
• 6320: Shipboard Alarm and Signal Systems
• 6330: Railroad Signal and Warning Devices
• 6340: Aircraft Alarm and Signal Systems
• 6350: Miscellaneous Alarm, Signal, and Security Detection Systems
• 63GP: Alarm, Signal, and Security Detection Systems -- General