<s>
It	O
was	O
initially	O
coded	O
in	O
FORTRAN	B-Application
77	O
,	O
but	O
rewritten	O
in	O
C	B-Language
before	O
the	O
release	O
of	O
version	O
1.0	O
in	O
1989	O
.	O
</s>
<s>
It	O
has	O
been	O
made	O
open-source	O
on	O
August	O
27	O
,	O
2010	O
under	O
the	O
GPL	B-License
license	I-License
.	O
</s>
