<s>
The	O
RCA	O
BIZMAC	B-Device
was	O
a	O
vacuum	O
tube	O
computer	O
manufactured	O
by	O
RCA	O
from	O
1956	O
to	O
1962	O
.	O
</s>
<s>
Although	O
RCA	O
was	O
noted	O
for	O
their	O
pioneering	O
work	O
in	O
transistors	B-Application
,	O
RCA	O
decided	O
to	O
build	O
a	O
vacuum	O
tube	O
computer	O
instead	O
of	O
a	O
transistorized	O
computer	O
.	O
</s>
<s>
The	O
result	O
was	O
the	O
BIZMAC	B-Device
computer	O
system	O
.	O
</s>
<s>
The	O
first	O
BIZMAC	B-Device
machine	O
was	O
installed	O
at	O
the	O
Ordnance	O
Tank-Automotive	O
Command	O
(	O
OTAC	O
)	O
in	O
Detroit	B-Application
,	I-Application
Michigan	I-Application
in	O
1956	O
.	O
</s>
<s>
Eventually	O
,	O
BIZMAC	B-Device
computer	O
systems	O
were	O
also	O
installed	O
at	O
Higbee	O
Department	O
Stores	O
,	O
Travelers	O
Insurance	O
Company	O
,	O
and	O
New	O
York	O
Life	O
Insurance	O
Company	O
.	O
</s>
<s>
The	O
huge	O
BIZMAC	B-Device
system	O
was	O
very	O
quickly	O
made	O
obsolete	O
by	O
faster	O
and	O
more	O
reliable	O
computer	O
systems	O
,	O
including	O
IBM	O
's	O
705	B-Device
computer	O
as	O
well	O
as	O
RCA	O
's	O
own	O
transistorized	O
501	B-Device
computer	O
.	O
</s>
<s>
The	O
BIZMAC	B-Device
was	O
taken	O
offline	O
from	O
the	O
OTAC	O
in	O
1962	O
.	O
</s>
<s>
Only	O
about	O
six	O
BIZMAC	B-Device
computers	O
were	O
actually	O
made	O
.	O
</s>
<s>
A	O
unique	O
feature	O
of	O
the	O
BIZMAC	B-Device
was	O
the	O
use	O
of	O
hundreds	O
of	O
permanently	O
mounted	O
tape	O
drives	O
.	O
</s>
<s>
One	O
of	O
the	O
original	O
engineers	O
of	O
the	O
BIZMAC	B-Device
was	O
Arnold	O
Spielberg	O
,	O
the	O
father	O
of	O
film	O
director	O
and	O
producer	O
Steven	O
Spielberg	O
.	O
</s>
