<s>
The	O
J	B-Device
–	I-Device
Machine	I-Device
(	O
Jellybean-Machine	O
)	O
was	O
a	O
parallel	B-Operating_System
computer	I-Operating_System
designed	O
by	O
the	O
MIT	O
Concurrent	B-Operating_System
VLSI	O
Architecture	O
group	O
in	O
conjunction	O
with	O
the	O
Intel	O
Corporation	O
.	O
</s>
<s>
The	O
machine	O
used	O
"	O
jellybean	O
"	O
parts	O
—	O
cheap	O
and	O
multitudinous	O
commodity	O
parts	O
,	O
each	O
with	O
a	O
processor	O
,	O
memory	O
,	O
and	O
a	O
fast	O
communication	O
interface	O
—	O
and	O
a	O
novel	O
network	O
interface	O
to	O
implement	O
fine	O
grained	O
parallel	B-Operating_System
programs	I-Operating_System
.	O
</s>
<s>
The	O
J-machine	B-Device
project	O
was	O
started	O
in	O
1988	O
based	O
on	O
work	O
in	O
Bill	O
Dally	O
's	O
doctoral	O
work	O
at	O
Caltech	O
.	O
</s>
<s>
In	O
order	O
to	O
make	O
use	O
of	O
large	O
numbers	O
of	O
processors	O
,	O
the	O
machine	O
featured	O
a	O
novel	O
network	O
interface	O
using	O
message	B-Architecture
passing	I-Architecture
.	O
</s>
<s>
Three	O
1024-node	O
J-machine	B-Device
systems	O
have	O
been	O
built	O
and	O
are	O
kept	O
at	O
MIT	O
,	O
Caltech	O
and	O
Argonne	O
National	O
Laboratory	O
.	O
</s>
