<s>
The	O
IBM	B-Device
604	I-Device
Electronic	O
Calculating	O
Punch	O
was	O
the	O
world	O
's	O
first	O
mass-produced	O
electronic	O
calculator	B-Application
along	O
with	O
its	O
predecessor	O
the	O
IBM	B-Device
603	I-Device
.	O
</s>
<s>
It	O
could	O
read	O
a	O
punched	B-Architecture
card	I-Architecture
from	O
a	O
deck	O
,	O
do	O
some	O
calculations	O
based	O
on	O
the	O
wiring	O
of	O
its	O
plugboard	O
,	O
and	O
punch	O
results	O
onto	O
the	O
same	O
card	O
.	O
</s>
<s>
The	O
604	O
and	O
a	O
modified	O
version	O
,	O
the	O
605	O
,	O
were	O
used	O
as	O
components	O
of	O
the	O
Card	O
Programmed	O
Electronic	O
Calculators	B-Application
(	O
CPC	O
and	O
CPC	O
II	O
)	O
.	O
</s>
<s>
The	O
circuit	O
module	O
design	O
and	O
packaging	O
was	O
also	O
used	O
for	O
the	O
IBM	B-Device
650	I-Device
,	O
the	O
world	O
's	O
first	O
mass-produced	O
computer	O
and	O
a	O
very	O
popular	O
computer	O
during	O
the	O
1960s	O
.	O
</s>
<s>
An	O
all-transistor	O
version	O
of	O
the	O
604	O
was	O
built	O
and	O
demonstrated	O
in	O
October	O
1954	O
.	O
</s>
<s>
Although	O
it	O
used	O
about	O
2000	O
transistors	B-Application
as	O
opposed	O
to	O
1250	O
tubes	O
in	O
the	O
original	O
,	O
it	O
occupied	O
only	O
half	O
the	O
volume	O
,	O
and	O
used	O
only	O
5%	O
as	O
much	O
power	O
.	O
</s>
<s>
This	O
was	O
only	O
an	O
experimental	O
machine	O
,	O
but	O
its	O
technology	O
was	O
used	O
to	O
build	O
the	O
IBM	B-Device
608	I-Device
,	O
which	O
shipped	O
in	O
December	O
1957	O
,	O
and	O
was	O
the	O
world	O
's	O
first	O
all-transistorized	O
electronic	O
calculator	B-Application
to	O
be	O
mass-produced	O
.	O
</s>
<s>
Most	O
of	O
the	O
circuitry	O
was	O
based	O
on	O
modifications	O
of	O
circuit	O
designs	O
used	O
in	O
the	O
earlier	O
603	B-Device
Electronic	I-Device
Multiplier	I-Device
and	O
was	O
packaged	O
in	O
small	O
replaceable	O
pluggable	O
units	O
,	O
each	O
typically	O
containing	O
one	O
miniature	O
vacuum	O
tube	O
.	O
</s>
<s>
Processing	O
was	O
still	O
locked	O
to	O
the	O
reader/punch	O
cycle	O
time	O
,	O
thus	O
program	O
execution	O
had	O
to	O
complete	O
within	O
the	O
time	O
between	O
a	O
punched	B-Architecture
card	I-Architecture
leaving	O
the	O
read	O
station	O
and	O
entering	O
the	O
punch	O
station	O
.	O
</s>
<s>
In	O
1974	O
,	O
there	O
were	O
still	O
over	O
400	O
IBM	B-Device
604s	I-Device
still	O
in	O
use	O
.	O
</s>
<s>
An	O
IBM	B-Device
604	I-Device
is	O
preserved	O
at	O
the	O
American	O
Computer	O
Museum	O
and	O
another	O
at	O
the	O
University	O
of	O
Amsterdam	O
Computer	O
Museum	O
.	O
</s>
