<s>
The	O
AN/USQ	B-Device
-20	I-Device
,	O
or	O
CP-642	O
or	O
Naval	B-Device
Tactical	I-Device
Data	I-Device
System	I-Device
(	O
NTDS	O
)	O
,	O
was	O
designed	O
as	O
a	O
more	O
reliable	O
replacement	O
for	O
the	O
Seymour	O
Cray-designed	O
AN/USQ	B-Device
-17	I-Device
with	O
the	O
same	O
instruction	B-General_Concept
set	I-General_Concept
.	O
</s>
<s>
A	O
version	O
of	O
the	O
AN/USQ	B-Device
-20	I-Device
for	O
use	O
by	O
the	O
other	O
military	O
services	O
and	O
NASA	O
was	O
designated	O
the	O
UNIVAC	B-Device
1206	I-Device
.	O
</s>
<s>
The	O
main	O
memory	O
was	O
32,768	O
words	O
of	O
core	B-General_Concept
memory	I-General_Concept
.	O
</s>
<s>
The	O
available	O
processor	B-General_Concept
registers	I-General_Concept
were	O
:	O
</s>
