<s>
OpenBUGS	B-Application
is	O
a	O
software	B-Application
application	I-Application
for	O
the	O
Bayesian	O
analysis	O
of	O
complex	O
statistical	O
models	O
using	O
Markov	B-General_Concept
chain	I-General_Concept
Monte	I-General_Concept
Carlo	I-General_Concept
(	O
MCMC	O
)	O
methods	O
.	O
</s>
<s>
OpenBUGS	B-Application
is	O
the	O
open	O
source	O
variant	O
of	O
WinBUGS	B-Algorithm
(	O
Bayesian	O
inference	O
Using	O
Gibbs	B-Algorithm
Sampling	I-Algorithm
)	O
.	O
</s>
<s>
It	O
runs	O
under	O
Microsoft	B-Application
Windows	I-Application
and	O
Linux	B-Application
,	O
as	O
well	O
as	O
from	O
inside	O
the	O
R	B-Language
statistical	I-Language
package	I-Language
.	O
</s>
<s>
Versions	O
from	O
v3.0.7	O
onwards	O
have	O
been	O
designed	O
to	O
be	O
at	O
least	O
as	O
efficient	O
and	O
reliable	O
as	O
WinBUGS	B-Algorithm
over	O
a	O
range	O
of	O
test	O
applications	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
different	O
licence	O
and	O
greater	O
range	O
of	O
operating	O
systems	O
,	O
a	O
fundamental	O
difference	O
between	O
OpenBUGS	B-Application
and	O
WinBUGS	B-Algorithm
is	O
the	O
way	O
in	O
which	O
the	O
expert	O
system	O
selects	O
the	O
updating	O
algorithm	O
to	O
use	O
for	O
the	O
class	O
of	O
full	O
conditional	O
distribution	O
of	O
each	O
node	O
.	O
</s>
<s>
While	O
WinBUGS	B-Algorithm
defines	O
one	O
algorithm	O
for	O
each	O
possible	O
class	O
,	O
there	O
is	O
no	O
limit	O
to	O
the	O
number	O
of	O
algorithms	O
that	O
OpenBUGS	B-Application
can	O
use	O
,	O
allowing	O
greater	O
flexibility	O
and	O
extensibility	O
.	O
</s>
<s>
Further	O
differences	O
are	O
detailed	O
on	O
the	O
OpenBUGS	B-Application
website	O
.	O
</s>
<s>
The	O
source	O
code	O
of	O
OpenBUGS	B-Application
is	O
written	O
in	O
the	O
Component	B-Language
Pascal	I-Language
programming	O
language	O
and	O
is	O
dependent	O
on	O
the	O
Component	B-Language
Pascal	I-Language
libraries	B-Library
provided	O
by	O
Oberon	O
Microsystems	O
as	O
part	O
of	O
the	O
Blackbox	B-Application
Component	I-Application
Framework	I-Application
.	O
</s>
<s>
Binaries	O
of	O
the	O
current	O
version	O
of	O
OpenBUGS	B-Application
are	O
available	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
and	O
the	O
previous	O
version	O
for	O
Linux	B-Application
,	O
it	O
can	O
also	O
run	O
under	O
WINE	B-Application
for	O
Linux	B-Application
.	O
</s>
<s>
Installation	O
problems	O
,	O
development	O
and	O
usage	O
questions	O
are	O
discussed	O
at	O
the	O
OpenBUGS	B-Application
Bulletin	O
Board	O
.	O
</s>
<s>
Attempts	O
to	O
port	O
OpenBUGS	B-Application
to	O
Java	B-Language
with	O
the	O
Gardens	O
Point	O
Component	B-Language
Pascal	I-Language
were	O
given	O
up	O
in	O
favor	O
of	O
a	O
new	O
portable	O
implementation	O
called	O
JAGS	B-Application
.	O
</s>
<s>
It	O
is	O
parsed	B-Language
by	O
OpenBUGS	B-Application
,	O
which	O
then	O
creates	O
an	O
executable	B-Application
(	O
compiled	O
code	O
)	O
that	O
generates	O
a	O
sample	O
from	O
the	O
posterior	O
distribution	O
when	O
run	O
.	O
</s>
<s>
OpenBUGS	B-Application
was	O
designed	O
to	O
run	O
together	O
with	O
S-Plus	B-Application
and	O
the	O
BUGS	O
language	O
is	O
similar	O
to	O
the	O
S	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
OpenBUGS	B-Application
works	O
well	O
together	O
with	O
R	B-Language
;	O
the	O
R2OpenBUGS	O
or	O
BRugs	O
packages	O
provides	O
some	O
interoperability	O
,	O
and	O
R	B-Language
modules	O
help	O
further	O
analyses	O
.	O
</s>
