CPO1 means Chief Petty Officer First Class in Military
Similar to CPO1
10BASE-T - 10 Megabits per second, Baseband, Twisted pair11AD - 11th Airborne Division
11B - Military Occupational Specialty for Infantryman
11z - Command Sergeant Major Military Occupational Specialty code
12 WVI - Twelvth West Virginia Infantry Regiment
121ARW - 121st Air Refueling Wing
129 RQW - 129th Rescue Wing
View all in Military