<s>
The	O
UNIVAC	B-Device
418	I-Device
was	O
a	O
transistorized	B-Device
,	O
18-bit	B-General_Concept
word	O
magnetic-core	O
memory	B-General_Concept
machine	O
made	O
by	O
Sperry	O
Univac	O
.	O
</s>
<s>
The	O
name	O
came	O
from	O
its	O
4-microsecond	O
memory	B-General_Concept
cycle	O
time	O
and	O
18-bit	B-General_Concept
word	O
.	O
</s>
<s>
The	O
assembly	B-Language
language	I-Language
for	O
this	O
class	O
of	O
computers	O
was	O
TRIM	O
III	O
and	O
ART418	O
.	O
</s>
<s>
The	O
TRIM	O
assembly	O
source	O
code	O
used	O
octal	O
numbers	O
as	O
opposed	O
to	O
more	O
common	O
hexadecimal	O
because	O
the	O
18-bit	B-General_Concept
words	O
are	O
evenly	O
divisible	O
by	O
3	O
,	O
but	O
not	O
by	O
4	O
.	O
</s>
<s>
A	O
-	O
Register	O
(	O
Double	O
precision	O
Accumulator	B-General_Concept
,	O
36	O
bits	O
)	O
composed	O
of	O
:	O
</s>
<s>
It	O
was	O
available	O
with	O
4,096	O
to	O
16,384	O
words	O
of	O
memory	B-General_Concept
.	O
</s>
<s>
The	O
418-I	O
was	O
also	O
available	O
in	O
a	O
militarized	O
version	O
as	O
the	O
UNIVAC	B-Device
1218	I-Device
.	O
</s>
<s>
The	O
first	O
UNIVAC	B-Device
418-II	I-Device
was	O
delivered	O
in	O
November	O
1964	O
.	O
</s>
<s>
It	O
was	O
available	O
with	O
4,096	O
to	O
65,536	O
(	O
18-bit	B-General_Concept
)	O
words	O
of	O
memory	B-General_Concept
.	O
</s>
<s>
Memory	B-General_Concept
cycle	O
time	O
was	O
reduced	O
to	O
2	O
microseconds	O
.	O
</s>
<s>
It	O
was	O
part	O
of	O
the	O
Navy	O
's	O
Mk	O
76	O
missile	O
fire	O
control	O
system	O
,	O
used	O
to	O
control	O
the	O
AN/SPG	B-Algorithm
-55	I-Algorithm
radar	O
system	O
.	O
</s>
<s>
The	O
first	O
UNIVAC	B-Device
418-III	I-Device
was	O
delivered	O
in	O
1969	O
.	O
</s>
<s>
It	O
was	O
available	O
with	O
32,768	O
to	O
131,072	O
words	O
of	O
memory	B-General_Concept
.	O
</s>
<s>
Memory	B-General_Concept
cycle	O
time	O
was	O
reduced	O
to	O
750	O
nanoseconds	O
.	O
</s>
<s>
New	O
instructions	O
were	O
added	O
for	O
floating-point	B-Algorithm
arithmetic	I-Algorithm
,	O
binary-to-decimal	O
and	O
decimal-to-binary	O
conversions	O
,	O
and	O
block	O
transfers	O
up	O
to	O
64	O
words	O
.	O
</s>
<s>
By	O
the	O
1990s	O
,	O
all	O
the	O
418	O
hardware	O
was	O
gone	O
,	O
but	O
the	O
California	O
Department	O
of	O
Water	O
Resources	O
was	O
still	O
running	O
418	O
emulation	O
on	O
a	O
UNIVAC	B-Device
1100/60	I-Device
.	O
</s>
