<s>
The	O
Monte	B-Device
Carlo	I-Device
trolley	I-Device
,	O
or	O
FERMIAC	B-Device
,	O
was	O
an	O
analog	O
computer	O
invented	O
by	O
physicist	O
Enrico	O
Fermi	O
to	O
aid	O
in	O
his	O
studies	O
of	O
neutron	O
transport	O
.	O
</s>
<s>
The	O
FERMIAC	B-Device
employed	O
the	O
Monte	B-Algorithm
Carlo	I-Algorithm
method	I-Algorithm
to	O
model	O
neutron	O
transport	O
in	O
various	O
types	O
of	O
nuclear	O
systems	O
.	O
</s>
<s>
At	O
each	O
stage	O
,	O
pseudo-random	B-Error_Name
numbers	I-Error_Name
are	O
used	O
to	O
make	O
decisions	O
that	O
affect	O
the	O
behavior	O
of	O
each	O
neutron	O
.	O
</s>
<s>
The	O
FERMIAC	B-Device
used	O
this	O
method	O
to	O
create	O
two-dimensional	O
neutron	O
genealogies	O
on	O
a	O
scale	O
diagram	O
of	O
a	O
nuclear	O
device	O
.	O
</s>
<s>
Years	O
later	O
,	O
in	O
1946	O
,	O
Fermi	O
participated	O
in	O
the	O
initial	O
review	O
of	O
results	O
from	O
the	O
ENIAC	B-Device
.	O
</s>
<s>
However	O
,	O
given	O
ENIAC	B-Device
's	O
powers	O
of	O
calculation	O
,	O
Ulam	O
saw	O
an	O
opportunity	O
to	O
resurrect	O
these	O
techniques	O
.	O
</s>
<s>
He	O
discussed	O
his	O
ideas	O
with	O
John	O
von	O
Neumann	O
,	O
who	O
eventually	O
used	O
the	O
ENIAC	B-Device
to	O
implement	O
the	O
Monte	B-Algorithm
Carlo	I-Algorithm
method	I-Algorithm
(	O
as	O
the	O
statistical	O
sampling	O
techniques	O
came	O
to	O
be	O
called	O
)	O
to	O
solve	O
a	O
variety	O
of	O
neutron	O
transport	O
problems	O
.	O
</s>
<s>
However	O
,	O
before	O
the	O
ENIAC	B-Device
could	O
be	O
employed	O
for	O
this	O
purpose	O
,	O
it	O
first	O
had	O
to	O
be	O
moved	O
to	O
its	O
permanent	O
home	O
at	O
the	O
Ballistics	O
Research	O
Laboratory	O
.	O
</s>
<s>
It	O
was	O
during	O
this	O
interruption	O
in	O
ENIAC	B-Device
operation	O
that	O
Fermi	O
came	O
up	O
with	O
the	O
idea	O
for	O
his	O
analog	O
device	O
.	O
</s>
<s>
King	O
to	O
build	O
the	O
instrument	O
,	O
which	O
was	O
later	O
given	O
the	O
fitting	O
name	O
FERMIAC	B-Device
.	O
</s>
