<s>
The	O
Cray	B-Device
Y-MP	I-Device
was	O
a	O
supercomputer	B-Architecture
sold	O
by	O
Cray	O
Research	O
from	O
1988	O
,	O
and	O
the	O
successor	O
to	O
the	O
company	O
's	O
X-MP	B-Device
.	O
</s>
<s>
The	O
Y-MP	O
retained	O
software	O
compatibility	O
with	O
the	O
X-MP	B-Device
,	O
but	O
extended	O
the	O
address	O
registers	O
from	O
24	O
to	O
32	O
bits	O
.	O
</s>
<s>
High-density	O
VLSI	O
ECL	B-General_Concept
technology	O
was	O
used	O
and	O
a	O
new	O
liquid-cooling	O
system	O
was	O
devised	O
.	O
</s>
<s>
The	O
Y-MP	O
ran	O
the	O
Cray	O
UNICOS	B-Operating_System
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
The	O
Y-MP	O
could	O
be	O
equipped	O
with	O
two	O
,	O
four	O
or	O
eight	O
vector	B-Operating_System
processors	I-Operating_System
,	O
with	O
two	O
functional	O
units	O
each	O
and	O
a	O
clock	O
cycle	O
time	O
of	O
6	O
ns	O
(	O
167MHz	O
)	O
.	O
</s>
<s>
Main	O
memory	O
comprised	O
128	O
,	O
256	O
or	O
512	O
MB	O
of	O
SRAM	B-Architecture
.	O
</s>
<s>
The	O
original	O
Y-MP	O
(	O
otherwise	O
known	O
as	O
the	O
Y-MP	O
Model	O
D	O
)	O
was	O
housed	O
in	O
a	O
chassis	O
similar	O
to	O
the	O
horseshoe-shaped	O
X-MP	B-Device
,	O
but	O
with	O
an	O
extra	O
rectangular	O
cabinet	O
added	O
in	O
the	O
middle	O
(	O
containing	O
the	O
CPU	O
boards	O
)	O
,	O
thus	O
forming	O
a	O
"	O
Y	O
"	O
shape	O
in	O
plan	O
view	O
.	O
</s>
<s>
This	O
replaced	O
the	O
SRAM	B-Architecture
of	O
the	O
Y-MP	O
with	O
up	O
to	O
32	O
GB	O
of	O
slower	O
,	O
but	O
physically	O
smaller	O
DRAM	O
devices	O
.	O
</s>
<s>
Later	O
,	O
the	O
model	O
name	O
was	O
abbreviated	O
to	O
the	O
Cray	B-Device
M90	I-Device
series	O
.	O
</s>
<s>
The	O
Y-MP	B-Device
C90	I-Device
series	O
is	O
described	O
separately	O
.	O
</s>
<s>
This	O
was	O
a	O
reimplementation	O
of	O
the	O
Y-MP	O
architecture	O
in	O
CMOS	B-Device
technology	O
,	O
based	O
on	O
the	O
S-2	O
design	O
acquired	O
by	O
Cray	O
from	O
Supertek	O
Computers	O
in	O
1990	O
.	O
</s>
<s>
The	O
EL	O
was	O
an	O
air-cooled	O
system	O
with	O
a	O
completely	O
different	O
VMEbus-based	O
IOS	O
.	O
</s>
<s>
The	O
Y-MP	O
EL	O
was	O
later	O
developed	O
into	O
the	O
Cray	B-Device
EL90	I-Device
series	O
(	O
EL92	O
,	O
EL94	O
and	O
EL98	O
)	O
.	O
</s>
<s>
In	O
the	O
1992	O
film	O
Sneakers	O
,	O
whose	O
story	O
is	O
centered	O
around	O
extremely	O
high-level	O
cryptography	O
,	O
two	O
lead	O
characters	O
have	O
an	O
important	O
discussion	O
while	O
sitting	O
on	O
a	O
Cray	B-Device
Y-MP	I-Device
.	O
</s>
<s>
a	O
character	O
expresses	O
her	O
excitement	O
at	O
having	O
finally	O
gained	O
access	O
to	O
a	O
"	O
CRAY	O
Y-MP3	O
"	O
supercomputer	B-Architecture
.	O
</s>
