<s>
The	O
Bureau	O
of	O
Transportation	O
Statistics	O
(	O
BTS	O
)	O
,	O
as	O
part	O
of	O
the	O
United	O
States	O
Department	O
of	O
Transportation	O
(	O
US	O
DOT	O
)	O
,	O
maintains	O
a	O
list	O
of	O
U.S.	O
state	O
and	O
country	O
codes	O
,	O
named	O
World	B-General_Concept
Area	I-General_Concept
Codes	I-General_Concept
(	O
WAC	O
)	O
.	O
</s>
