<s>
The	O
SPARCstation	B-Device
,	O
SPARCserver	B-Device
and	O
SPARCcenter	B-Device
product	O
lines	O
are	O
a	O
series	O
of	O
SPARC-based	O
computer	B-Device
workstations	I-Device
and	O
servers	O
in	O
desktop	O
,	O
desk	O
side	O
(	O
pedestal	O
)	O
and	O
rack-based	O
form	O
factor	O
configurations	O
,	O
that	O
were	O
developed	O
and	O
sold	O
by	O
Sun	O
Microsystems	O
.	O
</s>
<s>
The	O
first	O
SPARCstation	B-Device
was	O
the	O
SPARCstation	B-Architecture
1	I-Architecture
(	O
also	O
known	O
as	O
the	O
Sun	O
4/60	O
)	O
,	O
introduced	O
in	O
1989	O
.	O
</s>
<s>
The	O
series	O
was	O
very	O
popular	O
and	O
introduced	O
the	O
Sun-4c	B-Device
architecture	O
,	O
a	O
variant	O
of	O
the	O
Sun-4	B-Device
architecture	O
previously	O
introduced	O
in	O
the	O
Sun	O
4/260	O
.	O
</s>
<s>
Thanks	O
in	O
part	O
to	O
the	O
delay	O
in	O
the	O
development	O
of	O
more	O
modern	O
processors	O
from	O
Motorola	O
,	O
the	O
SPARCstation	B-Device
series	O
was	O
very	O
successful	O
across	O
the	O
entire	O
industry	O
.	O
</s>
<s>
The	O
last	O
model	O
bearing	O
the	O
SPARCstation	B-Device
name	O
was	O
the	O
SPARCstation	B-Architecture
4	I-Architecture
.	O
</s>
<s>
The	O
workstation	B-Device
series	O
was	O
replaced	O
by	O
the	O
Sun	B-Device
Ultra	I-Device
series	I-Device
in	O
1995	O
;	O
the	O
next	O
Sun	O
server	B-Application
generation	O
was	O
the	O
Sun	B-Architecture
Enterprise	I-Architecture
line	O
introduced	O
in	O
1996	O
.	O
</s>
<s>
Desktop	O
and	O
deskside	O
SPARCstations	B-Device
and	O
SPARCservers	B-Device
of	O
the	O
same	O
model	O
number	O
were	O
essentially	O
identical	O
systems	O
,	O
the	O
only	O
difference	O
being	O
that	O
systems	O
designated	O
as	O
servers	O
were	O
usually	O
"	O
headless	O
"	O
(	O
that	O
is	O
,	O
configured	O
without	O
a	O
graphics	B-Device
card	I-Device
and	O
monitor	O
)	O
,	O
and	O
were	O
sold	O
with	O
a	O
"	O
server	B-Application
"	O
rather	O
than	O
a	O
"	O
desktop	O
"	O
OS	O
license	O
.	O
</s>
<s>
For	O
example	O
,	O
the	O
SPARCstation	B-Architecture
20	I-Architecture
and	O
SPARCserver	B-Device
20	O
were	O
almost	O
identical	O
in	O
motherboard	B-Device
,	O
CPU	B-General_Concept
,	O
case	O
design	O
and	O
most	O
other	O
hardware	B-Architecture
specifications	O
.	O
</s>
<s>
Most	O
desktop	O
SPARCstations	B-Device
and	O
SPARCservers	B-Device
shipped	O
in	O
either	O
"	O
pizzabox	B-General_Concept
"	O
or	O
"	O
lunchbox	B-Device
"	O
enclosures	O
,	O
a	O
significant	O
departure	O
from	O
earlier	O
Sun	O
and	O
competing	O
systems	O
of	O
the	O
time	O
.	O
</s>
<s>
The	O
SPARCstation	B-Architecture
1	I-Architecture
,	O
2	O
,	O
4	O
,	O
5	O
,	O
10	O
and	O
20	O
were	O
"	O
pizzabox	B-General_Concept
"	O
machines	O
.	O
</s>
<s>
The	O
SPARCstation	B-Device
SLC	O
and	O
ELC	O
were	O
integrated	O
into	O
Sun	O
monochrome	B-Device
monitor	I-Device
enclosures	O
,	O
and	O
the	O
SPARCstation	B-Architecture
IPC	I-Architecture
,	O
IPX	O
,	O
SPARCclassic	B-Architecture
,	O
SPARCclassic	B-Architecture
X	O
and	O
SPARCstation	B-Architecture
LX	I-Architecture
were	O
"	O
lunchbox	B-Device
"	O
machines	O
.	O
</s>
<s>
SPARCserver	B-Device
models	O
ending	O
in	O
"	O
30	O
"	O
or	O
"	O
70	O
"	O
were	O
housed	O
in	O
deskside	O
pedestal	O
enclosures	O
(	O
respectively	O
5-slot	O
and	O
12-slot	O
VMEbus	B-Architecture
chassis	O
)	O
;	O
models	O
ending	O
in	O
"	O
90	O
"	O
and	O
the	O
SPARCcenter	B-Device
2000	O
came	O
in	O
rackmount	O
cabinet	O
enclosures	O
.	O
</s>
<s>
The	O
SPARCserver	B-Device
1000	O
's	O
design	O
was	O
a	O
large	O
rack-mountable	O
desktop	O
unit	O
.	O
</s>
<s>
Later	O
versions	O
of	O
the	O
SPARCstation	B-Device
series	O
,	O
such	O
as	O
the	O
SPARCstation	B-Architecture
10	I-Architecture
and	O
20	O
,	O
could	O
be	O
configured	O
as	O
multiprocessor	B-Operating_System
systems	O
as	O
they	O
were	O
based	O
on	O
the	O
MBus	B-Architecture
high-speed	O
bus	O
.	O
</s>
<s>
These	O
systems	O
could	O
accept	O
one	O
or	O
two	O
single	O
or	O
dual	O
central	B-General_Concept
processing	I-General_Concept
units	I-General_Concept
packaged	O
in	O
MBus	B-Architecture
modules	O
.	O
</s>
<s>
Until	O
the	O
launch	O
of	O
the	O
SPARCserver	B-Device
600MP	O
series	O
,	O
all	O
SPARCstation/server	O
models	O
were	O
also	O
assigned	O
Sun	O
4-series	O
model	O
numbers	O
.	O
</s>
<s>
Various	O
third-party	O
processor	O
upgrades	O
were	O
available	O
for	O
SPARCstation/server	O
systems	O
,	O
for	O
instance	O
the	O
80MHz	O
Weitek	O
POWER	O
μP	O
for	O
the	O
SPARCstation	B-Architecture
2	I-Architecture
or	O
IPX	O
,	O
or	O
the	O
Ross	O
hyperSPARC	B-General_Concept
MBus	B-Architecture
modules	O
rated	O
at	O
clock	O
speeds	O
up	O
to	O
200MHz	O
.	O
</s>
<s>
As	O
mentioned	O
above	O
,	O
some	O
models	O
listed	O
as	O
SPARCstations	B-Device
were	O
also	O
available	O
in	O
SPARCserver	B-Device
configuration	O
and	O
vice	O
versa	O
.	O
</s>
<s>
The	O
CS6400	B-Device
was	O
developed	O
by	O
an	O
outside	O
group	O
working	O
cooperatively	O
with	O
,	O
rather	O
than	O
competitively	O
against	O
,	O
Sun	O
Microsystems	O
;	O
as	O
a	O
result	O
,	O
although	O
sold	O
by	O
Cray	O
Research	O
as	O
the	O
Cray	B-Device
Superserver	I-Device
6400	I-Device
,	O
all	O
of	O
its	O
components	O
had	O
Sun	O
OEM	O
part	O
numbers	O
and	O
the	O
machine	O
was	O
documented	O
in	O
Sun	O
's	O
System	O
Handbook	O
.	O
</s>
<s>
In	O
1996	O
,	O
when	O
Cray	O
Research	O
was	O
bought	O
by	O
Silicon	O
Graphics	O
,	O
the	O
CS6400	B-Device
development	O
group	O
was	O
sold	O
to	O
Sun	O
,	O
and	O
released	O
the	O
64-processor	O
Sun	B-Architecture
Ultra	I-Architecture
Enterprise	I-Architecture
10000	O
"	O
Starfire	O
"	O
the	O
following	O
year	O
.	O
</s>
