<s>
Open	B-Application
Babel	I-Application
is	O
computer	O
software	O
,	O
a	O
chemical	O
expert	B-Application
system	I-Application
mainly	O
used	O
to	O
interconvert	O
chemical	O
file	O
formats	O
.	O
</s>
<s>
It	O
is	O
available	O
for	O
Windows	B-Application
,	O
Unix	B-Application
,	O
Linux	B-Application
,	O
macOS	B-Application
,	O
and	O
Android	B-Application
.	O
</s>
<s>
It	O
is	O
free	B-License
and	I-License
open-source	I-License
software	I-License
released	O
under	O
a	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
2.0	O
.	O
</s>
<s>
"	O
Open	B-Application
Babel	I-Application
is	O
a	O
community-driven	O
scientific	O
project	O
assisting	O
both	O
users	O
and	O
developers	O
as	O
a	O
cross-platform	O
program	O
and	O
library	O
designed	O
to	O
support	O
molecular	O
modeling	O
,	O
chemistry	O
,	O
and	O
many	O
related	O
areas	O
,	O
including	O
interconversion	O
of	O
file	O
formats	O
and	O
data.	O
"	O
</s>
<s>
Open	B-Application
Babel	I-Application
and	O
JOELib	B-Language
were	O
derived	O
from	O
the	O
OELib	B-Application
cheminformatics	O
library	O
.	O
</s>
<s>
In	O
turn	O
,	O
OELib	B-Application
was	O
based	O
on	O
ideas	O
in	O
the	O
original	O
chemistry	O
program	O
Babel	O
and	O
an	O
unreleased	O
object-oriented	B-Language
programming	I-Language
library	O
called	O
OBabel	O
.	O
</s>
