<s>
Application	B-Application
Center	I-Application
Test	I-Application
(	O
ACT	O
)	O
is	O
a	O
Microsoft	O
load	O
testing	O
tool	O
for	O
web	B-Application
servers	I-Application
,	O
focused	O
on	O
ASP.NET	B-Application
.	O
</s>
<s>
It	O
simulates	O
numerous	O
HTTP	B-Protocol
sessions	O
from	O
one	O
machine	O
.	O
</s>
<s>
Using	O
a	O
bank	O
of	O
multiple	O
computers	O
,	O
all	O
firing	O
off	O
repeated	O
HTTP	B-Protocol
requests	I-Protocol
,	O
a	O
significant	O
load	O
can	O
be	O
simulated	O
.	O
</s>
<s>
Tests	O
can	O
be	O
written	O
in	O
either	O
of	O
the	O
Microsoft	O
scripting	B-Language
languages	I-Language
:	O
VBScript	B-Application
and	O
JScript	B-Language
.	O
</s>
<s>
The	O
tool	O
can	O
also	O
be	O
used	O
for	O
functional	B-Application
testing	I-Application
,	O
although	O
that	O
is	O
not	O
what	O
it	O
is	O
designed	O
for	O
.	O
</s>
<s>
Application	B-Application
Center	I-Application
Test	I-Application
was	O
bundled	O
with	O
Visual	B-Application
Studio	I-Application
.NET	O
2003	O
Enterprise	O
Architect	O
and	O
Enterprise	O
Developer	O
editions	O
.	O
</s>
