<s>
Apple	B-Device
Workgroup	I-Device
Server	I-Device
and	O
Macintosh	B-Device
Server	I-Device
are	O
a	O
family	O
of	O
Macintosh-based	O
workgroup	B-Application
servers	I-Application
,	O
sold	O
by	O
Apple	O
Computer	O
from	O
1993	O
to	O
2003	O
.	O
</s>
<s>
Machines	O
bearing	O
these	O
names	O
are	O
re-branded	O
Centris	B-Device
,	O
Quadra	B-Device
and	O
Power	B-Device
Macintosh	I-Device
systems	O
with	O
additional	O
server	B-Application
software	I-Application
and	O
sometimes	O
larger	O
hard	B-Device
drives	I-Device
.	O
</s>
<s>
The	O
"	O
Workgroup	O
Server	O
"	O
name	O
was	O
used	O
until	O
the	O
release	O
of	O
the	O
Power	B-Device
Macintosh	I-Device
G3	I-Device
in	O
1998	O
.	O
</s>
<s>
In	O
1996	O
and	O
1997	O
,	O
Apple	O
also	O
sold	O
a	O
separate	O
range	O
of	O
machines	O
marketed	O
as	O
the	O
Apple	B-Device
Network	I-Device
Server	I-Device
,	O
which	O
were	O
specially-designed	O
servers	O
that	O
exclusively	O
ran	O
AIX	B-Application
and	O
thus	O
do	O
not	O
qualify	O
as	O
Macintosh	B-Device
computers	O
.	O
</s>
<s>
The	O
first	O
models	O
were	O
the	O
Workgroup	B-Device
Server	I-Device
60	I-Device
,	O
80	O
and	O
95	O
,	O
introduced	O
together	O
at	O
CeBIT	O
in	O
Hanover	O
on	O
March	O
22	O
,	O
1993	O
.	O
</s>
<s>
New	O
models	O
were	O
introduced	O
every	O
year	O
except	O
1995	O
,	O
and	O
remained	O
on	O
the	O
market	O
until	O
2003	O
,	O
several	O
months	O
after	O
the	O
rack-mounted	O
Xserve	B-Device
was	O
introduced	O
.	O
</s>
<s>
Name	O
Introduced	O
Discontinued	O
Based	O
on	O
Notes	O
Workgroup	B-Device
Server	I-Device
95	I-Device
March	O
1993	O
April	O
1995	O
Macintosh	B-Device
Quadra	I-Device
950	I-Device
Was	O
sold	O
with	O
A/UX	B-Operating_System
,	O
but	O
is	O
able	O
to	O
run	O
Mac	B-Application
OS	I-Application
as	O
well	O
.	O
</s>
<s>
The	O
differences	O
to	O
the	O
Quadra	B-Device
are	O
a	O
digital	O
tape	O
drive	O
(	O
DAT	O
)	O
and	O
a	O
PDS	O
card	O
containing	O
a	O
fast	O
SCSI	O
connection	O
and	O
a	O
256k	O
level	O
2	O
CPU	O
cache	O
.	O
</s>
<s>
Mac	B-Application
OS	I-Application
Supported	O
:	O
System	O
7.0.1	O
to	O
Mac	B-Application
OS	I-Application
8.1	O
Workgroup	B-Device
Server	I-Device
60	I-Device
July	O
1993	O
October	O
1994	O
Macintosh	B-Device
Centris	I-Device
610	I-Device
The	O
Centris	B-Device
610	I-Device
was	O
later	O
sold	O
as	O
the	O
"	O
Quadra	B-Device
610	I-Device
"	O
.	O
</s>
<s>
Mac	B-Application
OS	I-Application
Supported	O
:	O
(	O
68k	O
,	O
System	O
7.1-Mac	O
OS	O
8.1	O
)	O
(	O
PPC	O
,	O
System	O
7.1.2-Mac	O
OS	O
9.1	O
)	O
Workgroup	B-Device
Server	I-Device
80	I-Device
July	O
1993	O
October	O
1994	O
Macintosh	B-Device
Quadra	I-Device
800	I-Device
Workgroup	B-Device
Server	I-Device
6150	I-Device
April	O
1994	O
October	O
1995	O
Power	B-Device
Macintosh	I-Device
6100	I-Device
Speed	O
bumped	O
from	O
60	O
to	O
66	O
MHz	O
in	O
April	O
1995	O
.	O
</s>
<s>
Mac	B-Application
OS	I-Application
Supported	O
:	O
(	O
60	O
MHz	O
,	O
System	O
7.1.2-Mac	O
OS	O
9.1	O
)	O
(	O
66	O
MHz	O
,	O
System	O
7.5-Mac	O
OS	O
9.1	O
)	O
Workgroup	B-Device
Server	I-Device
8150	I-Device
April	O
1994	O
February	O
1996	O
Power	B-Device
Macintosh	I-Device
8100	I-Device
Speed	O
bumped	O
from	O
80	O
to	O
110	O
MHz	O
in	O
April	O
1995	O
Workgroup	B-Device
Server	I-Device
9150	I-Device
April	O
1994	O
February	O
1996	O
n/a	O
The	O
only	O
Workgroup	O
Server	O
not	O
directly	O
based	O
on	O
a	O
workstation	O
.	O
</s>
<s>
It	O
featured	O
an	O
80	O
MHz	O
(	O
speed	O
bumped	O
to	O
120	O
MHz	O
in	O
April	O
1995	O
)	O
PowerPC	O
601	O
board	O
in	O
a	O
Quadra	B-Device
950	I-Device
style	O
case.Workgroup	O
Server	O
9150	O
at	O
Low	O
End	O
Mac	O
and	O
apple-history.com	O
Workgroup	B-Device
Server	I-Device
7250	I-Device
February	O
1996	O
April	O
1997	O
Power	B-Device
Macintosh	I-Device
7200	I-Device
Workgroup	B-Device
Server	I-Device
8550	I-Device
February	O
1996	O
March	O
1998	O
Power	B-Device
Macintosh	I-Device
8500	I-Device
Workgroup	B-Device
Server	I-Device
7350	I-Device
April	O
1997	O
March	O
1998	O
Power	B-Device
Macintosh	I-Device
7300	I-Device
Workgroup	B-Device
Server	I-Device
9650	I-Device
April	O
1997	O
March	O
1998	O
Power	B-Device
Macintosh	I-Device
9600	I-Device
Macintosh	B-Device
Server	I-Device
G3	O
March	O
1998	O
December	O
1998	O
Power	B-Device
Macintosh	I-Device
G3	I-Device
Mini	O
Tower	O
Macintosh	B-Device
Server	I-Device
G3	O
January	O
1999	O
August	O
1999	O
Power	B-Device
Macintosh	I-Device
G3	I-Device
Blue	O
and	O
White	O
Macintosh	B-Device
Server	I-Device
G4	I-Device
September	O
1999	O
January	O
2003	O
Power	B-Device
Mac	I-Device
G4	I-Device
Multiple	O
models	O
mirroring	O
the	O
Power	B-Device
Mac	I-Device
G4	I-Device
's	O
history	O
.	O
</s>
<s>
The	O
first	O
is	O
based	O
on	O
the	O
"	O
Sawtooth	O
"	O
(	O
AGP	O
graphics	O
)	O
Power	B-Device
Mac	I-Device
G4	I-Device
,	O
the	O
last	O
on	O
the	O
initial	O
"	O
Mirrored	O
Drive	O
Doors	O
"	O
PowerMac	B-Device
G4	I-Device
.	O
</s>
