<s>
The	O
RAYDAC	B-Device
(	O
for	O
Raytheon	B-Device
Digital	I-Device
Automatic	I-Device
Computer	I-Device
)	O
was	O
a	O
one-of-a-kind	O
computer	O
built	O
by	O
Raytheon	O
.	O
</s>
<s>
The	O
RAYDAC	B-Device
used	O
5,200	O
vacuum	O
tubes	O
and	O
18,000	O
crystal	O
diodes	O
.	O
</s>
