University of Illinois
KKG 54
DG 53
All below are unofficial (and I hesitate to post because some seem unlikely):
SDT 54
XO 55
AGD 35
AEPhi 31
AXiD 55
DZ 45
KAT 45
ADPi 46
DDD 46
__________________ Adding 's does not make a word, not even an acronym, plural
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