<s>
Plated-wire	B-General_Concept
memory	I-General_Concept
is	O
a	O
variation	O
of	O
core	B-General_Concept
memory	I-General_Concept
developed	O
by	O
Bell	O
Laboratories	O
in	O
1957	O
.	O
</s>
<s>
Instead	O
of	O
threading	O
individual	O
ferrite	O
cores	O
on	O
wires	O
,	O
plated-wire	B-General_Concept
memory	I-General_Concept
used	O
a	O
grid	O
of	O
wires	O
coated	O
with	O
a	O
thin	O
layer	O
of	O
iron	O
–	O
nickel	O
alloy	O
called	O
permalloy	O
.	O
</s>
<s>
Operation	O
was	O
generally	O
similar	O
to	O
core	B-General_Concept
memory	I-General_Concept
,	O
with	O
the	O
wire	O
itself	O
acting	O
as	O
the	O
data	O
line	O
,	O
and	O
the	O
magnetic	O
domains	O
providing	O
the	O
individual	O
bit	O
locations	O
defined	O
by	O
address	O
(	O
word	O
)	O
lines	O
running	O
on	O
either	O
side	O
of	O
(	O
and	O
perpendicular	O
to	O
)	O
the	O
data	O
wire	O
.	O
</s>
<s>
Improvements	O
in	O
semiconductor	O
RAM	O
chips	O
provided	O
the	O
higher	O
storage	O
densities	O
and	O
higher	O
speeds	O
needed	O
for	O
large-scale	O
application	O
such	O
as	O
mainframe	B-Architecture
computers	I-Architecture
,	O
replacing	O
previous	O
types	O
of	O
memory	O
,	O
including	O
both	O
core	O
and	O
plated-wire	B-General_Concept
memory	I-General_Concept
.	O
</s>
<s>
Plated-wire	B-General_Concept
memory	I-General_Concept
has	O
been	O
used	O
in	O
a	O
number	O
of	O
applications	O
,	O
typically	O
in	O
aerospace	O
.	O
</s>
<s>
It	O
was	O
used	O
in	O
the	O
UNIVAC	O
1110	O
and	O
UNIVAC	O
9000	O
series	O
computers	O
,	O
the	O
Viking	O
program	O
that	O
sent	O
landers	O
to	O
Mars	B-Application
,	O
the	O
Voyager	O
space	O
probes	O
,	O
a	O
prototype	O
guidance	O
computer	O
for	O
the	O
Minuteman-III	O
,	O
the	O
Space	O
Shuttle	O
Main	O
Engine	O
controllers	O
,	O
the	O
KH-9	O
Hexagon	O
reconnaissance	O
satellite	O
,	O
and	O
in	O
the	O
Hubble	O
Space	O
Telescope	O
.	O
</s>
