<s>
The	O
Standards	B-Application
of	I-Application
Fundamental	I-Application
Astronomy	I-Application
(	O
SOFA	B-Application
)	O
software	B-Library
libraries	I-Library
are	O
a	O
collection	O
of	O
subroutines	O
that	O
implement	O
official	O
International	O
Astronomical	O
Union	O
(	O
IAU	O
)	O
algorithms	O
for	O
astronomical	O
computations	O
.	O
</s>
<s>
As	O
of	O
February	O
2009	O
they	O
are	O
available	O
in	O
both	O
Fortran	B-Application
and	O
C	B-Language
source	O
code	O
format	O
.	O
</s>
<s>
As	O
of	O
the	O
February	O
2009	O
release	O
,	O
SOFA	B-Application
licensing	B-License
changed	O
to	O
allow	O
use	O
for	O
any	O
purpose	O
,	O
provided	O
certain	O
requirements	O
are	O
met	O
.	O
</s>
<s>
Previously	O
,	O
commercial	O
usage	O
was	O
specifically	O
excluded	O
and	O
required	O
written	O
agreement	O
of	O
the	O
SOFA	B-Application
board	O
.	O
</s>
