<s>
In	O
typesetting	O
software	O
,	O
TeX	B-General_Concept
Directory	I-General_Concept
Structure	I-General_Concept
(	O
TDS	O
)	O
is	O
a	O
directory	O
hierarchy	O
for	O
macros	O
,	O
fonts	O
,	O
and	O
the	O
other	O
implementation-independent	O
TeX	B-Application
system	O
files	O
.	O
</s>
<s>
TDS	O
is	O
used	O
by	O
several	O
TeX	B-Application
distributions	O
,	O
including	O
teTeX	B-General_Concept
,	O
TeX	B-General_Concept
Live	I-General_Concept
and	O
MiKTeX	B-General_Concept
.	O
</s>
