<s>
In	O
computing	O
,	O
FOSI	O
(	O
Formatting	B-Language
Output	I-Language
Specification	I-Language
Instance	I-Language
)	O
is	O
a	O
stylesheet	B-Language
language	I-Language
for	O
SGML	B-Language
and	O
,	O
later	O
,	O
XML	B-Protocol
.	O
</s>
<s>
FOSI	O
was	O
developed	O
by	O
the	O
US	O
Department	O
of	O
Defense	O
to	O
control	O
the	O
pagination	O
and	O
layout	O
of	O
SGML	B-Language
and	O
XML	B-Protocol
technical	O
data	O
.	O
</s>
<s>
FOSI	O
stylesheets	O
are	O
themselves	O
written	O
in	O
SGML	B-Language
,	O
an	O
approach	O
that	O
would	O
later	O
be	O
adopted	O
by	O
XSL	B-Language
.	O
</s>
