<s>
The	O
SGI	B-Device
IRIS	I-Device
series	O
of	O
terminals	O
and	O
workstations	O
from	O
Silicon	O
Graphics	O
was	O
produced	O
in	O
the	O
1980s	O
and	O
1990s	O
.	O
</s>
<s>
The	O
early	O
systems	O
up	O
to	O
IRIS	O
3000	O
use	O
the	O
Motorola	B-Device
68000	I-Device
series	I-Device
of	O
processors	O
originally	O
,	O
and	O
later	O
models	O
feature	O
early-generation	O
MIPS	O
processors	O
.	O
</s>
<s>
These	O
systems	O
run	O
the	O
GL2	B-Device
operating	O
system	O
,	O
a	O
predecessor	O
of	O
the	O
IRIX	B-Operating_System
operating	O
system	O
,	O
which	O
is	O
based	O
on	O
UniSoft	B-Operating_System
UniPlus	B-Operating_System
System	B-Operating_System
V	I-Operating_System
Unix	I-Operating_System
.	O
</s>
<s>
GL2	B-Device
uses	O
a	O
proprietary	O
windowing	O
system	O
named	O
mex	O
(	O
Multiple	O
EXposure	O
)	O
.	O
</s>
<s>
The	O
first	O
model	O
,	O
the	O
IRIS	O
1000	O
,	O
was	O
shipped	O
around	O
November	O
1983	O
with	O
an	O
8	O
MHz	O
Motorola	B-Device
68000	I-Device
CPU	O
.	O
</s>
<s>
It	O
is	O
a	O
graphics	O
terminal	O
intended	O
to	O
be	O
attached	O
to	O
a	O
VAX-11	O
system	O
running	O
either	O
VAX/VMS	B-Operating_System
or	O
BSD	B-Operating_System
Unix	I-Operating_System
.	O
</s>
<s>
It	O
has	O
a	O
10	O
MHz	O
Motorola	B-Device
68010	I-Device
.	O
</s>
<s>
The	O
MIPS	O
based	O
IRIS	O
line	O
includes	O
SGI	B-Device
IRIS	I-Device
4D	O
,	O
IRIS	B-Device
Indigo	I-Device
,	O
and	O
IRIS	B-Device
Crimson	I-Device
.	O
</s>
<s>
The	O
SGI	B-Device
IRIS	I-Device
4D	O
series	O
was	O
released	O
in	O
the	O
late	O
1980s	O
through	O
mid	O
1990s	O
,	O
as	O
the	O
Personal	O
,	O
Professional	O
,	O
and	O
Crimson	B-Device
subseries	O
.	O
</s>
<s>
They	O
are	O
the	O
first	O
SGI	O
workstations	O
to	O
use	O
the	O
MIPS	B-Device
architecture	I-Device
.	O
</s>
<s>
The	O
line	O
culminated	O
with	O
the	O
Crimson	B-Device
which	O
was	O
produced	O
from	O
1992	O
to	O
1997	O
with	O
the	O
same	O
case	O
as	O
PowerSeries	O
.	O
</s>
