407 RRD means 407th Radio Research Detachment in Military
Similar to 407 RRD
102 RQS - 102nd Rescue Squadron106 RQW - 106th Rescue Wing
10BASE-T - 10 Megabits per second, Baseband, Twisted pair
11AD - 11th Airborne Division
11B - Military Occupational Specialty for Infantryman
11z - Command Sergeant Major Military Occupational Specialty code
12 WVI - Twelvth West Virginia Infantry Regiment
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