<s>
The	O
UNIVAC	B-Device
1105	I-Device
was	O
a	O
follow-on	O
computer	O
to	O
the	O
UNIVAC	O
1103A	O
introduced	O
by	O
Sperry	O
Rand	O
in	O
September	O
1958	O
.	O
</s>
<s>
The	O
UNIVAC	B-Device
1105	I-Device
used	O
21	O
types	O
of	O
vacuum	O
tubes	O
,	O
11	O
types	O
of	O
diodes	O
,	O
10	O
types	O
of	O
transistors	B-Application
,	O
and	O
three	O
core	O
types	O
.	O
</s>
<s>
The	O
UNIVAC	B-Device
1105	I-Device
had	O
either	O
8,192	O
or	O
12,288	O
words	O
of	O
36-bit	O
magnetic	O
core	B-General_Concept
memory	I-General_Concept
,	O
in	O
two	O
or	O
three	O
banks	O
of	O
4,096	O
words	O
each	O
.	O
</s>
<s>
Magnetic	B-General_Concept
drum	I-General_Concept
memory	I-General_Concept
provided	O
either	O
16,384	O
or	O
32,768	O
words	O
,	O
in	O
one	O
or	O
two	O
drums	O
with	O
16,384	O
words	O
each	O
.	O
</s>
<s>
Sixteen	O
to	O
twenty-four	O
UNISERVO	B-Device
II	I-Device
tape	O
drives	O
were	O
connected	O
,	O
with	O
a	O
maximum	O
capacity	O
(	O
not	O
counting	O
block	O
overhead	O
)	O
of	O
1,200,000	O
words	O
per	O
tape	O
.	O
</s>
<s>
Floating-point	B-Algorithm
numbers	I-Algorithm
had	O
a	O
one-bit	O
sign	O
,	O
an	O
eight-bit	O
characteristic	O
,	O
and	O
a	O
27-bit	O
mantissa	O
.	O
</s>
<s>
Instructions	B-General_Concept
had	O
a	O
six-bit	O
operation	O
code	O
and	O
two	O
15-bit	O
operand	O
addresses	O
.	O
</s>
<s>
A	O
complete	O
UNIVAC	B-Device
1105	I-Device
computer	O
system	O
required	O
160kW	O
of	O
power	O
(	O
175	O
KVA	O
,	O
0.9	O
power	B-Application
factor	I-Application
)	O
and	O
an	O
air	O
conditioning	O
unit	O
with	O
a	O
power	O
of	O
at	O
least	O
35	O
tons	O
(	O
123kW	O
)	O
for	O
cooling	O
input	O
water	O
.	O
</s>
<s>
In	O
1959	O
,	O
a	O
Univac	B-Device
1105	I-Device
located	O
in	O
the	O
basement	O
of	O
Phillips	O
Hall	O
of	O
The	O
University	O
of	O
North	O
Carolina	O
at	O
Chapel	O
Hill	O
was	O
one	O
of	O
three	O
computers	O
of	O
its	O
type	O
.	O
</s>
