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ABCDEFGHIJKLMNOPQRSTUVWXYZ
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o.n.o.
o’nyong-nyong fever
o.o.
O.O.D.
O’Odham
O-ring
O.S.
o.s.
o/s
o.t.
O2 sup
OA
oaf
oafish
Oahu
oak
oak apple
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OASDHI
OASDHI


abbr 
Definition:
 
U.S. Old Age, Survivors, Disability, and Health Insurance
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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