<s>
The	O
Sun	B-Device
Ultra	I-Device
series	I-Device
is	O
a	O
discontinued	O
line	O
of	O
workstation	B-Device
and	O
server	B-Application
computers	I-Application
developed	O
and	O
sold	O
by	O
Sun	O
Microsystems	O
,	O
comprising	O
two	O
distinct	O
generations	O
.	O
</s>
<s>
This	O
generation	O
was	O
partially	O
replaced	O
by	O
the	O
Sun	B-Architecture
Blade	I-Architecture
in	O
2000	O
and	O
that	O
line	O
was	O
in	O
itself	O
replaced	O
by	O
the	O
Sun	O
Java	O
Workstationan	O
AMD	B-General_Concept
Opteron	I-General_Concept
systemin	O
2004	O
.	O
</s>
<s>
In	O
sync	O
with	O
the	O
transition	O
to	O
x86-64-architecture	O
processors	O
,	O
in	O
2005	O
the	O
Ultra	O
brand	O
was	O
later	O
revived	O
with	O
the	O
launch	O
of	O
the	O
Ultra	O
20	O
and	O
Ultra	O
40	O
,	O
albeit	O
to	O
some	O
confusion	O
,	O
since	O
they	O
were	O
no	O
longer	O
based	O
on	O
UltraSPARC	B-General_Concept
processors	O
.	O
</s>
<s>
The	O
original	O
Ultra	O
workstations	B-Device
and	O
the	O
Ultra	B-Architecture
Enterprise	I-Architecture
(	O
later	O
,	O
"	O
Sun	B-Architecture
Enterprise	I-Architecture
"	O
)	O
servers	O
were	O
UltraSPARC-based	O
systems	O
produced	O
from	O
1995	O
to	O
2001	O
,	O
replacing	O
the	O
earlier	O
SPARCstation	B-Device
and	O
SPARCcenter/SPARCserver	O
series	O
respectively	O
.	O
</s>
<s>
This	O
introduced	O
the	O
64-bit	B-Device
UltraSPARC	B-General_Concept
processor	O
and	O
in	O
later	O
versions	O
,	O
lower-cost	O
PC-derived	O
technology	O
,	O
such	O
as	O
the	O
PCI	B-Protocol
and	O
ATA	B-Protocol
buses	O
(	O
the	O
initial	O
Ultra	B-Architecture
1	I-Architecture
and	O
2	O
models	O
retained	O
the	O
SBus	B-Architecture
of	O
their	O
predecessors	O
)	O
.	O
</s>
<s>
The	O
original	O
Ultra	O
range	O
were	O
sold	O
during	O
the	O
dot-com	O
boom	O
,	O
and	O
became	O
one	O
of	O
the	O
biggest	O
selling	O
series	O
of	O
computers	O
ever	O
developed	O
by	O
Sun	O
Microsystems	O
,	O
with	O
many	O
companies	O
and	O
organisations	O
—	O
including	O
Sun	O
itself	O
—	O
relying	O
on	O
Sun	B-Device
Ultra	I-Device
products	O
for	O
years	O
after	O
their	O
successor	O
products	O
were	O
released	O
.	O
</s>
<s>
The	O
Ultra	O
brand	O
was	O
revived	O
in	O
2005	O
with	O
the	O
launch	O
of	O
the	O
Ultra	O
20	O
and	O
Ultra	O
40	O
with	O
x86-64-architecture	O
.	O
</s>
<s>
x64-based	O
Ultra	O
systems	O
remained	O
in	O
the	O
Sun	O
portfolio	O
for	O
five	O
more	O
years	O
;	O
the	O
last	O
one	O
,	O
the	O
Intel	O
Xeon-based	O
Ultra	O
27	O
,	O
was	O
retired	O
in	O
June	O
2010	O
,	O
thereby	O
concluding	O
the	O
history	O
of	O
Sun	O
as	O
a	O
workstation	B-Device
vendor	O
.	O
</s>
<s>
The	O
SPARC-based	O
Ultra	O
3	O
Mobile	O
Workstation	B-Device
laptop	O
was	O
released	O
in	O
2005	O
as	O
well	O
,	O
but	O
it	O
would	O
prove	O
to	O
be	O
a	O
short-lived	O
design	O
and	O
was	O
retired	O
the	O
next	O
year	O
.	O
</s>
<s>
Additionally	O
,	O
new	O
Ultra	O
25	O
and	O
Ultra	O
45	O
desktop	O
UltraSPARC	B-General_Concept
IIIi-based	O
systems	O
were	O
introduced	O
in	O
2006	O
.	O
</s>
<s>
In	O
October	O
2008	O
,	O
Sun	O
discontinued	O
all	O
these	O
,	O
effectively	O
ending	O
the	O
production	O
of	O
SPARC	O
architecture	O
workstations	B-Device
.	O
</s>
<s>
The	O
original	O
Ultra/Enterprise	O
series	O
itself	O
was	O
later	O
replaced	O
by	O
the	O
Sun	B-Architecture
Blade	I-Architecture
workstation	B-Device
and	O
Sun	B-Architecture
Fire	I-Architecture
server	B-Application
ranges	O
.	O
</s>
<s>
Note	O
:	O
the	O
Enterprise	O
220R	O
is	O
an	O
Ultra	B-Architecture
60	I-Architecture
motherboard	O
in	O
a	O
rack-mountable	B-Application
server	B-Application
chassis	O
with	O
hot-swappable	B-Device
power	O
supplies	O
.	O
</s>
<s>
Similarly	O
,	O
the	O
Enterprise	O
420R	O
is	O
an	O
Ultra	B-Architecture
80	I-Architecture
motherboard	O
in	O
a	O
server	B-Application
chassis	O
.	O
</s>
<s>
In	O
the	O
intervening	O
time	O
gap	O
,	O
Sun	O
workstations	B-Device
were	O
named	O
Sun	B-Architecture
Blade	I-Architecture
and	O
Sun	B-Device
Java	I-Device
Workstation	I-Device
.	O
</s>
<s>
The	O
A60	O
Ultra	O
3	O
mobile	O
workstation	B-Device
rebadged	O
the	O
Tadpole	O
SPARCle	O
(	O
550	O
and	O
650	O
MHz	O
)	O
and	O
Viper	O
(	O
1.2	O
GHz	O
)	O
laptops	O
.	O
</s>
