<s>
ATL	B-Language
Server	I-Language
is	O
a	O
technology	O
originally	O
developed	O
by	O
Microsoft	O
for	O
developing	O
web-based	B-Application
applications	I-Application
.	O
</s>
<s>
It	O
uses	O
a	O
tag	O
replacement	O
engine	O
written	O
in	O
C++	B-Language
to	O
render	B-Protocol
web	O
pages	O
.	O
</s>
<s>
It	O
draws	O
on	O
the	O
existing	O
technologies	O
like	O
ISAPI	B-Library
and	O
the	O
Active	B-Language
Template	I-Language
Library	I-Language
,	O
and	O
includes	O
a	O
template	O
library	B-Library
which	O
is	O
dedicated	O
for	O
use	O
with	O
developing	O
Web-based	B-Application
applications	I-Application
.	O
</s>
<s>
ATL	B-Language
Server	I-Language
first	O
appeared	O
with	O
Visual	O
Studio	O
.NET	O
2003	O
.	O
</s>
<s>
Most	O
of	O
the	O
ATL	B-Language
Server	I-Language
code	O
base	O
has	O
been	O
released	O
as	O
a	O
shared	O
source	O
project	O
on	O
CodePlex	B-Protocol
,	O
a	O
Microsoft-run	O
code	O
sharing	O
web	O
site	O
.	O
</s>
<s>
A	O
typical	O
ATL	B-Language
server	I-Language
application	O
consists	O
of	O
at	O
least	O
one	O
ISAPI	B-Library
extension	O
DLL	O
along	O
with	O
one	O
or	O
a	O
number	O
of	O
Server	O
Response	O
Files	O
(	O
.srf	O
)	O
and	O
their	O
associated	O
application	O
DLL	O
files	O
which	O
provide	O
the	O
application	O
functionality	O
.	O
</s>
<s>
SRF	O
files	O
can	O
contain	O
a	O
mix	O
of	O
HTML	B-Language
and	O
script	O
tags	O
.	O
</s>
