<s>
GNU	B-Application
Units	I-Application
is	O
a	O
cross-platform	B-Operating_System
computer	B-Application
program	I-Application
for	O
conversion	O
of	O
units	O
of	O
quantities	O
.	O
</s>
<s>
This	O
for	O
instance	O
allows	O
conversion	O
of	O
velocities	O
specified	O
in	O
furlongs	O
per	O
fortnight	B-Application
,	O
and	O
pressures	O
specified	O
in	O
tons	O
per	O
acre	O
.	O
</s>
<s>
GNU	B-Application
Units	I-Application
was	O
written	O
by	O
Adrian	O
Mariano	O
as	O
an	O
implementation	O
of	O
the	O
units	O
utility	O
included	O
with	O
the	O
Unix	B-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
The	O
GNU	O
variant	O
is	O
distributed	O
under	O
the	O
GPL	B-License
although	O
the	O
FreeBSD	B-Operating_System
project	I-Operating_System
maintains	O
a	O
free	O
fork	O
of	O
units	O
from	O
before	O
the	O
license	O
change	O
.	O
</s>
<s>
The	O
original	O
units	O
program	O
has	O
been	O
a	O
standard	O
part	O
of	O
Unix	B-Application
since	O
the	O
early	O
Bell	O
Laboratories	O
versions	O
.	O
</s>
<s>
Source	O
code	O
for	O
a	O
version	O
very	O
similar	O
to	O
the	O
original	O
is	O
available	O
from	O
the	O
Heirloom	B-Device
Project	I-Device
.	O
</s>
<s>
A	O
script	O
for	O
updating	O
the	O
currency	O
conversions	O
is	O
included	O
;	O
the	O
script	O
requires	O
Python	B-Language
.	O
</s>
<s>
UDUNITS	B-Application
is	O
a	O
similar	O
utility	O
program	O
,	O
except	O
that	O
it	O
has	O
an	O
additional	O
programming	B-Library
library	I-Library
interface	O
and	O
date	O
conversion	O
abilities	O
.	O
</s>
<s>
UDUNITS	B-Application
is	O
considered	O
the	O
de	O
facto	O
program	O
and	O
library	B-Library
for	O
variable	O
unit	O
conversion	O
for	O
netCDF	B-Application
files	O
.	O
</s>
<s>
GNU	B-Application
Units	I-Application
version	O
2.19	O
was	O
released	O
on	O
31	O
May	O
2019	O
,	O
to	O
reflect	O
the	O
new	O
2019	O
revision	O
of	O
the	O
SI	O
;	O
Version	O
2.14	O
released	O
on	O
8	O
March	O
2017	O
fixed	O
several	O
minor	O
bugs	O
and	O
improved	O
support	O
for	O
building	O
on	O
Windows	B-Application
.	O
</s>
<s>
Beginning	O
with	O
version	O
2.10	O
,	O
a	O
32-bit	B-Application
Windows	I-Application
binary	O
distribution	O
has	O
been	O
available	O
on	O
the	O
project	O
Web	O
page	O
(	O
a	O
32-bit	B-Application
Windows	I-Application
port	O
of	O
version	O
1.87	O
has	O
been	O
available	O
since	O
2008	O
as	O
part	O
of	O
the	O
GnuWin32	B-Language
project	O
)	O
.	O
</s>
<s>
The	O
names	O
of	O
the	O
standard	O
and	O
personal	O
units	O
data	O
files	O
were	O
changed	O
,	O
and	O
the	O
currency	O
definitions	O
were	O
placed	O
in	O
a	O
separate	O
data	O
file	O
;	O
a	O
Python	B-Language
script	I-Language
for	O
updating	O
the	O
currency	O
definitions	O
was	O
added	O
.	O
</s>
<s>
The	O
examples	O
that	O
follow	O
show	O
results	O
from	O
GNU	B-Application
units	I-Application
version	O
2.10	O
.	O
</s>
