History
After the Air Force separated from the Army in 1947, it retained the Army's system of MOS occupation codes, modifying them in 1954. These were 5-digit codes; for example a maintenance data systems specialist was 39150 and a weather technician was 25170. In October 1993, the Air Force implemented a new system of AFSCs, aligning occupations with the forcewide restructuring that was implemented under Merrill McPeak. These reduced officer AFSCs from 216 to 123 and enlisted AFSCs from 203 to 176.
Read more about this topic: Air Force Specialty Code
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