<s>
The	O
Regional	B-Application
Atmospheric	I-Application
Modeling	I-Application
System	I-Application
(	O
RAMS	O
)	O
is	O
a	O
set	O
of	O
computer	O
programs	O
that	O
simulate	B-Application
the	O
atmosphere	O
for	O
weather	O
and	O
climate	O
research	O
and	O
for	O
numerical	B-General_Concept
weather	I-General_Concept
prediction	I-General_Concept
(	O
NWP	O
)	O
.	O
</s>
<s>
It	O
is	O
written	O
primarily	O
in	O
Fortran	B-Application
with	O
some	O
C	B-Language
code	O
and	O
it	O
runs	O
best	O
under	O
the	O
Unix	B-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
RAMS	O
is	O
the	O
basis	O
for	O
a	O
system	O
simulating	O
the	O
Martian	O
atmosphere	O
that	O
is	O
named	O
MRAMS	B-Application
.	O
</s>
