<s>
GNATS	B-Application
is	O
the	B-Application
GNU	I-Application
project	I-Application
's	O
issue-tracking	B-Application
software	O
.	O
</s>
<s>
GNATS	B-Application
is	O
a	O
set	O
of	O
tools	O
for	O
tracking	O
bugs	O
reported	O
by	O
users	O
to	O
a	O
central	O
site	O
.	O
</s>
<s>
GNATS	B-Application
stores	O
all	O
the	O
information	O
about	O
problem	O
reports	O
in	O
its	O
databases	O
and	O
provides	O
tools	O
for	O
querying	O
,	O
editing	O
,	O
and	O
maintenance	O
of	O
the	O
databases	O
.	O
</s>
<s>
GNATS	B-Application
is	O
free	B-Application
software	I-Application
,	O
distributed	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
GNATS	B-Application
is	O
used	O
by	O
GNU	B-Application
packages	I-Application
and	O
NetBSD	B-Device
.	O
</s>
<s>
The	O
Apache	O
Software	O
Foundation	O
used	O
the	O
software	O
from	O
1996	O
–	O
2002	O
,	O
and	O
the	O
Mutt	B-Device
project	O
until	O
2006	O
.	O
</s>
<s>
It	O
is	O
also	O
used	O
,	O
or	O
was	O
used	O
in	O
the	O
past	O
,	O
by	O
the	O
FreeBSD	B-Operating_System
Project	I-Operating_System
,	O
OpenBSD	B-Operating_System
,	O
Juniper	O
Networks	O
,	O
Nordic	O
Optical	O
Telescope	O
,	O
CERN	O
,	O
Green	O
Bank	O
Telescope	O
,	O
NRAO	O
AIPS++	O
,	O
European	O
Software	O
Institute	O
,	O
and	O
the	O
BaBar	O
Project	O
at	O
SLAC	O
.	O
</s>
<s>
In	O
early	O
June	O
2014	O
,	O
FreeBSD	B-Operating_System
announced	O
concrete	O
plans	O
to	O
migrate	O
from	O
GNATS	B-Application
to	O
Bugzilla	B-Application
,	O
claiming	O
that	O
Bugzilla	B-Application
supports	O
finer	O
granularity	O
for	O
categories	O
and	O
keywords	O
.	O
</s>
<s>
Furthermore	O
,	O
the	O
announcement	O
states	O
that	O
GNATS	B-Application
is	O
missing	O
many	O
features	O
that	O
people	O
expect	O
from	O
a	O
modern	O
bug	B-Application
tracker	I-Application
.	O
</s>
<s>
It	O
has	O
been	O
described	O
as	O
having	O
been	O
"	O
the	O
cornerstone	O
"	O
of	O
free	B-Application
software	I-Application
bug-tracking	B-Application
systems	I-Application
.	O
</s>
<s>
GNATS	B-Application
was	O
written	O
by	O
Heinz	O
G	O
.	O
Seidl	O
of	O
Cygnus	O
Solutions	O
,	O
inspired	O
by	O
BSD	B-Operating_System
Unix	I-Operating_System
's	O
sendbug	O
and	O
filebug	O
programs	O
,	O
and	O
had	O
its	O
first	O
stable	O
release	O
in	O
1992	O
.	O
</s>
<s>
Although	O
GNATS	B-Application
is	O
still	O
in	O
use	O
,	O
development	O
slowed	O
since	O
the	O
4.1	O
release	O
in	O
2005	O
.	O
</s>
<s>
Built	O
as	O
a	O
client-server	O
architecture	O
,	O
GNATS	B-Application
works	O
with	O
many	O
interfaces	O
(	O
described	O
below	O
)	O
including	O
email	O
,	O
command	O
line	O
,	O
and	O
web	O
interfaces	O
.	O
</s>
<s>
All	O
GNATS	B-Application
databases	O
and	O
configuration	O
can	O
be	O
stored	O
in	O
plain	O
text	O
files	O
,	O
which	O
helps	O
in	O
the	O
modularity	O
of	O
GNATS	B-Application
.	O
</s>
<s>
Categorisation	O
and	O
recategorisation	O
of	O
bug	B-Application
reports	I-Application
is	O
particularly	O
simple	O
.	O
</s>
<s>
Four	O
official	O
interfaces	O
exist	O
for	O
GNATS	B-Application
:	O
</s>
<s>
Apart	O
from	O
these	O
,	O
custom	O
ones	O
can	O
be	O
developed	O
such	O
as	O
OpenBSD	B-Operating_System
's	O
sendbug	O
interface	O
which	O
collects	O
system	O
information	O
and	O
submits	O
Problem	O
Reports	O
via	O
email	O
.	O
</s>
