<s>
The	O
ArsDigita	B-Protocol
Community	I-Protocol
System	I-Protocol
(	O
ACS	O
)	O
was	O
an	O
open	B-Application
source	I-Application
toolkit	O
for	O
developing	O
community	O
web	B-Application
applications	I-Application
developed	O
primarily	O
by	O
developers	O
associated	O
with	O
ArsDigita	O
Corporation	O
.	O
</s>
<s>
It	O
was	O
licensed	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
GPL	I-License
,	O
and	O
is	O
one	O
of	O
the	O
most	O
famous	O
products	O
to	O
be	O
based	O
completely	O
on	O
AOLserver	B-Language
.	O
</s>
<s>
Although	O
there	O
were	O
several	O
forks	O
of	O
the	O
project	O
,	O
the	O
only	O
one	O
that	O
is	O
still	O
actively	O
maintained	O
is	O
OpenACS	B-Protocol
.	O
</s>
<s>
Features	O
of	O
ACS	O
included	O
a	O
core	O
set	O
of	O
APIs	O
,	O
datamodels	O
,	O
and	O
database	O
routines	O
for	O
coordinating	O
information	O
common	O
to	O
all	O
community	O
web	B-Application
applications	I-Application
,	O
as	O
well	O
as	O
modules	O
such	O
as	O
workflow	O
management	O
,	O
CMS	B-Protocol
,	O
messaging	O
,	O
bug/issue	B-Application
tracking	I-Application
,	O
project	O
tracking	O
,	O
e-commerce	O
,	O
and	O
bboards	O
.	O
</s>
<s>
The	O
ACS	O
was	O
originally	O
written	O
using	O
the	O
Oracle	B-General_Concept
database	I-General_Concept
and	O
AOLserver	B-Language
threaded	O
web	O
server	O
and	O
thus	O
was	O
a	O
combination	O
of	O
SQL	B-Language
,	O
HTML	B-Language
templates	O
,	O
and	O
Tcl	B-Operating_System
code	O
to	O
merge	O
database	O
results	O
with	O
templates	O
.	O
</s>
<s>
In	O
2001	O
,	O
the	O
code	O
tree	O
was	O
forked	O
,	O
with	O
the	O
Tcl	B-Operating_System
code	O
base	O
being	O
maintained	O
and	O
refactored	O
by	O
one	O
group	O
of	O
developers	O
,	O
while	O
the	O
product	O
line	O
was	O
being	O
re-written	O
in	O
Java	B-Language
EE	I-Language
.	O
</s>
<s>
As	O
a	O
result	O
of	O
this	O
,	O
the	O
Java	O
version	O
was	O
renamed	O
"	O
Red	O
Hat	O
CCM	O
"	O
,	O
and	O
official	O
support	O
for	O
the	O
Tcl	B-Operating_System
version	O
ceased	O
.	O
</s>
<s>
However	O
,	O
the	O
Tcl	B-Operating_System
version	O
continued	O
to	O
be	O
maintained	O
by	O
the	O
OpenACS	B-Protocol
community	O
.	O
</s>
<s>
Some	O
of	O
the	O
applications	O
are	O
Workflow	O
,	O
CMS	B-Protocol
,	O
Messaging	O
,	O
Bug/Issue	O
tracker	O
,	O
e-commerce	O
,	O
blogger	O
,	O
chat	B-Protocol
and	O
forums	O
.	O
</s>
<s>
Features	O
include	O
permissioning	O
,	O
full	O
internationalization	O
,	O
Ajax	B-General_Concept
,	O
form	O
builder	O
,	O
object	O
model	O
,	O
automated	O
testing	O
,	O
subsites	O
and	O
a	O
powerful	O
package	O
manager	O
.	O
</s>
<s>
OpenACS	B-Protocol
runs	O
on	O
AOLserver	B-Language
and	O
NaviServer	B-Language
with	O
either	O
Oracle	B-General_Concept
or	O
PostgreSQL	B-Application
as	O
its	O
database	O
.	O
</s>
<s>
Projects	O
that	O
were	O
or	O
are	O
based	O
on	O
OpenACS	B-Protocol
include	O
dotLrn	O
,	O
dotFolio	O
,	O
dotCommunity	O
,	O
dotConsult	O
,	O
and	O
Project-Open	O
.	O
</s>
