<s>
The	O
Cray	B-Device
EL90	I-Device
series	O
was	O
an	O
air-cooled	O
vector	B-Operating_System
processor	I-Operating_System
supercomputer	B-Architecture
first	O
sold	O
by	O
Cray	O
Research	O
in	O
1993	O
.	O
</s>
<s>
The	O
EL90	O
series	O
evolved	O
from	O
the	O
Cray	B-Device
Y-MP	I-Device
EL	I-Device
minisupercomputer	B-Device
,	O
and	O
is	O
compatible	O
with	O
Y-MP	O
software	O
,	O
running	O
the	O
same	O
UNICOS	B-Operating_System
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
The	O
EL90	O
series	O
Input/Output	O
Subsystem	O
(	O
IOS	O
)	O
was	O
based	O
on	O
the	O
VMEbus	B-Architecture
and	O
a	O
Heurikon	O
HK68	O
Motorola	O
68000-based	O
processor	O
board	O
(	O
or	O
IOP	O
)	O
.	O
</s>
<s>
The	O
IOP	O
also	O
provided	O
the	O
system	O
's	O
serial	B-Device
console	I-Device
.	O
</s>
<s>
The	O
EL90	O
series	O
was	O
superseded	O
by	O
the	O
Cray	B-Device
J90	I-Device
series	O
.	O
</s>
