<s>
The	O
HITAC	B-Device
S-820	I-Device
is	O
a	O
family	O
of	O
vector	B-Operating_System
supercomputers	B-Architecture
developed	O
,	O
manufactured	O
and	O
marketed	O
by	O
Hitachi	O
.	O
</s>
<s>
Announced	O
in	O
July	O
1987	O
,	O
it	O
was	O
Hitachi	O
's	O
second	O
supercomputer	B-Architecture
,	O
succeeding	O
the	O
HITAC	B-Device
S-810	I-Device
.	O
</s>
<s>
The	O
S-820	O
is	O
categorized	O
as	O
a	O
second	O
generation	O
Japanese	O
supercomputer	B-Architecture
.	O
</s>
<s>
The	O
S-820	O
system	O
has	O
both	O
a	O
scalar	O
and	O
vector	B-Operating_System
processor	I-Operating_System
,	O
similar	O
to	O
the	O
architecture	O
of	O
the	O
S-810	O
.	O
</s>
<s>
The	O
S-820/80	O
had	O
double	O
the	O
vector	B-Operating_System
computational	O
capability	O
,	O
as	O
well	O
as	O
more	O
storage	O
capability	O
,	O
compared	O
to	O
the	O
S-820/60	O
.	O
</s>
<s>
These	O
two	O
models	O
differ	O
in	O
the	O
number	O
of	O
vector	B-Operating_System
pipelines	O
installed	O
.	O
</s>
<s>
A	O
team	O
from	O
the	O
Institute	O
for	O
Supercomputing	B-Architecture
Research	O
(	O
Tokyo	O
)	O
and	O
the	O
Los	O
Alamos	O
National	O
Laboratory	O
benchmarked	O
the	O
S-820/80	O
against	O
the	O
similar	O
generation	O
NEC	B-Device
SX-2	I-Device
and	O
Cray	O
X-MP/416	O
,	O
as	O
well	O
as	O
the	O
S-810	O
,	O
during	O
early	O
1988	O
.	O
</s>
<s>
They	O
concluded	O
that	O
the	O
S-820	O
was	O
"	O
a	O
great	O
deal	O
faster	O
in	O
vector	B-Operating_System
mode	O
than	O
any	O
other	O
supercomputer	B-Architecture
we	O
have	O
measured	O
"	O
.	O
</s>
