<s>
The	B-Operating_System
UNIVAC	I-Operating_System
II	O
computer	O
was	O
an	O
improvement	O
to	O
the	B-Operating_System
UNIVAC	I-Operating_System
I	O
that	O
the	B-Operating_System
UNIVAC	I-Operating_System
division	O
of	O
Sperry	O
Rand	O
first	O
delivered	O
in	O
1958	O
.	O
</s>
<s>
The	O
improvements	O
included	O
the	O
expansion	O
of	O
core	B-General_Concept
memory	I-General_Concept
from	O
2,000	O
to	O
10,000	O
words	O
;	O
UNISERVO	B-Device
II	I-Device
tape	O
drives	O
,	O
which	O
could	O
use	O
either	O
the	O
old	O
UNIVAC	B-Operating_System
I	I-Operating_System
metal	O
tapes	O
or	O
the	O
new	O
PET	O
tapes	O
;	O
and	O
some	O
transistorized	B-Device
circuits	O
(	O
although	O
it	O
was	O
still	O
overwhelmingly	O
a	O
vacuum	O
tube	O
computer	O
)	O
.	O
</s>
<s>
It	O
was	O
fully	O
compatible	O
with	O
existing	O
UNIVAC	B-Operating_System
I	I-Operating_System
programs	O
for	O
both	O
code	O
and	O
data	O
.	O
</s>
<s>
The	O
speed	O
of	O
the	O
memory	O
has	O
been	O
adjusted	O
to	O
the	O
speed	O
of	O
the	O
arithmetic	O
portion	O
of	O
the	B-Operating_System
Univac	I-Operating_System
which	O
permits	O
the	O
transfer	O
into	O
or	O
out	O
of	O
the	O
memory	O
of	O
12	O
characters	O
in	O
40	O
microseconds	O
.	O
</s>
<s>
The	O
pulse	O
code	O
used	O
in	O
the	B-Operating_System
Univac	I-Operating_System
System	O
is	O
so	O
designed	O
that	O
all	O
characters	O
contain	O
an	O
odd	O
number	O
of	O
pulses	O
.	O
</s>
<s>
Univac	B-Operating_System
is	I-Operating_System
completely	O
fused	O
in	O
order	O
that	O
faults	O
may	O
be	O
isolated	O
.	O
</s>
