<s>
The	O
gun	B-Device
data	I-Device
computer	I-Device
was	O
a	O
series	O
of	O
artillery	B-Application
computers	O
used	O
by	O
the	O
U.S.	O
Army	O
for	O
coastal	O
artillery	B-Application
,	O
field	O
artillery	B-Application
and	O
anti-aircraft	O
artillery	B-Application
applications	O
.	O
</s>
<s>
M1	O
:	O
This	O
was	O
used	O
by	O
seacoast	O
artillery	B-Application
for	O
major-caliber	O
seacoast	O
guns	O
.	O
</s>
<s>
It	O
utilised	O
the	O
same	O
type	O
of	O
input	O
data	O
furnished	O
by	O
a	O
range	O
section	O
with	O
the	O
then-current	O
(	O
1940	O
)	O
types	O
of	O
position-finding	O
and	O
fire-control	B-Application
equipment	I-Application
.	O
</s>
<s>
M3	O
:	O
This	O
was	O
used	O
in	O
conjunction	O
with	O
the	O
M9	B-Device
and	O
M10	O
directors	O
to	O
compute	O
all	O
required	O
firing	O
data	O
,	O
i.e.	O
</s>
<s>
M8	O
:	O
This	O
was	O
an	O
electronic	O
computer	O
(	O
using	O
vacuum	O
tube	O
technology	O
)	O
built	O
by	O
Bell	O
Labs	O
and	O
used	O
by	O
coast	O
artillery	B-Application
with	O
medium-caliber	O
guns	O
(	O
up	O
to	O
)	O
.	O
</s>
<s>
M9	B-Device
:	O
This	O
was	O
identical	O
to	O
the	O
M8	O
except	O
for	O
some	O
mechanisms	O
and	O
parts	O
which	O
were	O
altered	O
to	O
accommodate	O
anti-aircraft	O
ammunition	O
and	O
guns	O
.	O
</s>
<s>
M10	O
:	O
A	O
ballistics	O
computer	O
,	O
part	O
of	O
the	O
M38	O
fire	B-Application
control	I-Application
system	I-Application
,	O
for	O
Skysweeper	O
anti-aircraft	O
guns	O
.	O
</s>
<s>
M15	O
:	O
A	O
part	O
of	O
the	O
M35	O
field	O
artillery	B-Application
fire-control	B-Application
system	I-Application
,	O
which	O
included	O
the	O
M1	O
gunnery	O
officer	O
console	O
and	O
M27	O
power	O
supply	O
.	O
</s>
<s>
M18	O
:	O
FADAC	O
(	O
Field	O
Artillery	B-Application
Digital	O
Automatic	O
Computer	O
)	O
,	O
an	O
all-transistorized	O
general-purpose	O
digital	O
computer	O
manufactured	O
by	O
Amelco	O
(	O
Teledyne	O
Systems	O
,	O
Inc.	O
,	O
)	O
and	O
North	O
American	O
—	O
Autonetics	O
.	O
</s>
<s>
M26	O
:	O
A	O
fire-control	B-Application
computer	I-Application
for	O
AH-1	O
Cobra	O
helicopters	O
,	O
(	O
AH-1F	O
)	O
.	O
</s>
<s>
The	O
Battery	B-Device
Computer	I-Device
System	I-Device
(	O
BCS	O
)	O
AN/GYK	O
-29	O
was	O
a	O
computer	O
used	O
by	O
the	O
United	O
States	O
Army	O
for	O
computing	O
artillery	B-Application
fire	O
mission	O
data	O
.	O
</s>
<s>
It	O
replaced	O
the	O
Field	O
Artillery	B-Application
Digital	O
Automatic	O
Computer	O
(	O
FADAC	O
)	O
and	O
was	O
small	O
enough	O
to	O
fit	O
into	O
the	O
HMMWV	O
combat	O
vehicle	O
.	O
</s>
<s>
The	O
AN/GSG	O
-10	O
TACFIRE	B-Device
system	O
automated	O
Field	O
Artillery	B-Application
command	O
and	O
control	O
functions	O
.	O
</s>
<s>
It	O
was	O
composed	O
of	O
computers	O
and	O
remote	O
devices	O
such	O
as	O
the	O
Variable	O
Format	O
Message	O
Entry	O
Device	O
(	O
VFMED	O
)	O
,	O
the	O
Digital	O
Message	O
Device	O
(	O
DMD	O
)	O
and	O
the	O
Firefinder	B-Algorithm
Field	O
Artillery	B-Application
target	O
acquisition	O
radar	B-Application
system	I-Application
linked	O
by	O
digital	O
communications	O
using	O
existing	O
radio	O
and	O
wire	O
communications	O
equipment	O
.	O
</s>
<s>
Later	O
in	O
its	O
service	O
life	O
,	O
it	O
also	O
linked	O
with	O
the	O
Battery	B-Device
Computer	I-Device
System	I-Device
(	O
BCS	O
)	O
which	O
had	O
more	O
advanced	O
targeting	O
algorithms	O
.	O
</s>
<s>
The	O
last	O
TACFIRE	B-Device
fielding	O
was	O
completed	O
during	O
1987	O
.	O
</s>
<s>
Replacement	O
of	O
TACFIRE	B-Device
equipment	O
began	O
during	O
1994	O
.	O
</s>
<s>
TACFIRE	B-Device
used	O
the	O
AN/GYK	B-Device
-12	I-Device
,	O
a	O
second-generation	O
mainframe	O
computer	O
developed	O
primarily	O
by	O
Litton	O
Industries	O
for	O
Army	O
Divisional	O
Field	O
Artillery	B-Application
(	O
DIVARTY	O
)	O
units	O
.	O
</s>
<s>
Field	O
Artillery	B-Application
Brigades	O
also	O
use	O
the	O
division	O
configuration	O
.	O
</s>
<s>
The	O
successor	O
to	O
the	O
TACFIRE	B-Device
system	O
is	O
the	O
Advanced	O
Field	O
Artillery	B-Application
Tactical	O
Data	O
System	O
(	O
AFATDS	O
)	O
.	O
</s>
<s>
It	O
replaced	O
both	O
BCS	O
(	O
for	O
technical	O
fire	O
solutions	O
)	O
and	O
IFSAS/L	O
-TACFIRE	O
(	O
for	O
tactical	O
fire	O
control	O
)	O
systems	O
in	O
U.S.	O
Field	O
Artillery	B-Application
organizations	O
,	O
as	O
well	O
as	O
in	O
maneuver	O
fire	O
support	O
elements	O
at	O
the	O
battalion	O
level	O
and	O
higher	O
.	O
</s>
<s>
As	O
of	O
2009	O
,	O
the	O
U.S.	O
Army	O
was	O
transitioning	O
from	O
a	O
version	O
based	O
on	O
a	O
Sun	O
Microsystems	O
SPARC	B-Architecture
computer	O
running	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
to	O
a	O
version	O
based	O
on	O
laptop	O
computers	O
running	O
the	O
Microsoft	B-Application
Windows	I-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
Currently	O
there	O
is	O
one	O
surviving	O
example	O
of	O
FADAC	O
at	O
the	O
Fort	O
Sill	O
artillery	B-Application
museum	O
.	O
</s>
