<s>
The	O
bomba	B-Device
,	O
or	O
bomba	B-Device
kryptologiczna	O
(	O
Polish	O
for	O
"	O
bomb	B-Device
"	O
or	O
"	O
cryptologic	B-Device
bomb	I-Device
"	O
)	O
,	O
was	O
a	O
special-purpose	O
machine	O
designed	O
around	O
October	O
1938	O
by	O
Polish	O
Cipher	O
Bureau	O
cryptologist	O
Marian	O
Rejewski	O
to	O
break	O
German	O
Enigma-machine	O
ciphers	O
.	O
</s>
<s>
How	O
the	O
machine	O
came	O
to	O
be	O
called	O
a	O
"	O
bomb	B-Device
"	O
has	O
been	O
an	O
object	O
of	O
fascination	O
and	O
speculation	O
.	O
</s>
<s>
He	O
claimed	O
that	O
Jerzy	O
Różycki	O
(	O
the	O
youngest	O
of	O
the	O
three	O
Enigma	O
cryptologists	O
,	O
and	O
who	O
had	O
died	O
in	O
a	O
Mediterranean	O
passenger-ship	O
sinking	O
in	O
January	O
1942	O
)	O
named	O
the	O
"	O
bomb	B-Device
"	O
after	O
an	O
ice-cream	O
dessert	O
of	O
that	O
name	O
.	O
</s>
<s>
Rejewski	O
himself	O
stated	O
that	O
the	O
device	O
had	O
been	O
dubbed	O
a	O
"	O
bomb	B-Device
"	O
"	O
for	O
lack	O
of	O
a	O
better	O
idea	O
"	O
.	O
</s>
<s>
Perhaps	O
the	O
most	O
credible	O
explanation	O
is	O
given	O
by	O
a	O
Cipher	O
Bureau	O
technician	O
,	O
Czesław	O
Betlewski	O
:	O
workers	O
at	O
B.S.-4	O
,	O
the	O
Cipher	O
Bureau	O
's	O
German	O
section	O
,	O
christened	O
the	O
machine	O
a	O
"	O
bomb	B-Device
"	O
(	O
also	O
,	O
alternatively	O
,	O
a	O
"	O
washing	O
machine	O
"	O
or	O
a	O
"	O
mangle	O
"	O
)	O
because	O
of	O
the	O
characteristic	O
muffled	O
noise	O
that	O
it	O
produced	O
when	O
operating	O
.	O
</s>
<s>
A	O
machine	O
called	O
the	O
"	O
bombe	B-Device
"	O
is	O
used	O
to	O
expedite	O
the	O
solution	O
.	O
</s>
<s>
Hence	O
the	O
name	O
"	O
bombe	B-Device
"	O
.	O
</s>
<s>
The	O
U.S.	O
Army	O
's	O
above	O
description	O
of	O
the	O
Polish	O
bomba	B-Device
is	O
both	O
vague	O
and	O
inaccurate	O
,	O
as	O
is	O
clear	O
from	O
the	O
device	O
's	O
description	O
at	O
the	O
end	O
of	O
the	O
second	O
paragraph	O
of	O
the	O
"	O
History	O
"	O
section	O
,	O
below	O
:	O
"	O
Each	O
bomb	B-Device
...	O
essentially	O
constituted	O
an	O
electrically	O
powered	O
aggregate	O
of	O
six	O
Enigmas	O
...	O
"	O
Determination	O
of	O
a	O
solution	O
involved	O
no	O
disassembly	O
(	O
"	O
a	O
part	O
...	O
fall[ing]	O
off	O
"	O
)	O
of	O
the	O
device	O
.	O
</s>
<s>
In	O
order	O
to	O
mechanize	O
and	O
speed	O
up	O
the	O
process	O
,	O
Rejewski	O
,	O
a	O
civilian	O
mathematician	O
working	O
at	O
the	O
Polish	O
General	O
Staff	O
's	O
Cipher	O
Bureau	O
in	O
Warsaw	B-Application
,	O
invented	O
the	O
"	O
bomba	B-Device
kryptologiczna	O
"	O
(	O
cryptologic	B-Device
bomb	I-Device
)	O
,	O
probably	O
in	O
October	O
1938	O
.	O
</s>
<s>
Each	O
bomb	B-Device
(	O
six	O
were	O
built	O
in	O
Warsaw	B-Application
for	O
the	O
Cipher	O
Bureau	O
before	O
September	O
1939	O
)	O
essentially	O
constituted	O
an	O
electrically	O
powered	O
aggregate	O
of	O
six	O
Enigmas	O
and	O
took	O
the	O
place	O
of	O
some	O
one	O
hundred	O
workers	O
.	O
</s>
<s>
The	O
bomb	B-Device
method	O
was	O
based	O
,	O
like	O
the	O
Poles	O
 '	O
earlier	O
"	O
grill	O
"	O
method	O
,	O
on	O
the	O
fact	O
that	O
the	O
plug	O
connections	O
in	O
the	O
commutator	O
(	O
"	O
plugboard	O
"	O
)	O
did	O
not	O
change	O
all	O
the	O
letters	O
.	O
</s>
<s>
But	O
while	O
the	O
grill	O
method	O
required	O
unchanged	O
pairs	O
of	O
letters	O
,	O
the	O
bomb	B-Device
method	O
required	O
only	O
unchanged	O
letters	O
.	O
</s>
<s>
In	O
mid-November	O
1938	O
,	O
the	O
bombs	B-Device
were	O
ready	O
,	O
and	O
the	O
reconstructing	O
of	O
daily	O
keys	O
now	O
took	O
about	O
two	O
hours	O
.	O
</s>
<s>
We	O
would	O
have	O
had	O
to	O
markedly	O
increase	O
the	O
personnel	O
to	O
operate	O
the	O
bombs	B-Device
,	O
to	O
produce	O
the	O
perforated	O
sheets	O
(	O
60	O
series	O
of	O
26	O
sheets	O
each	O
were	O
now	O
needed	O
,	O
whereas	O
up	O
to	O
the	O
meeting	O
on	O
July	O
25	O
,	O
1939	O
,	O
we	O
had	O
only	O
two	O
such	O
series	O
ready	O
)	O
and	O
to	O
manipulate	O
the	O
sheets.	O
"	O
</s>
