<s>
A	O
shielded	B-Protocol
data	I-Protocol
link	I-Protocol
connector	I-Protocol
is	O
a	O
type	O
of	O
electrical	B-Protocol
connector	I-Protocol
in	O
which	O
the	O
signal	O
pins	O
are	O
surrounded	O
by	O
a	O
metal	O
shield	O
.	O
</s>
<s>
It	O
also	O
features	O
a	O
locking	O
mechanism	O
and	O
is	O
available	O
in	O
differently	O
keyed	O
plugs	B-Protocol
that	O
correspond	O
to	O
the	O
proper	O
socket	O
.	O
</s>
<s>
It	O
has	O
been	O
used	O
by	O
several	O
different	O
products	O
,	O
most	O
notably	O
on	O
the	O
original	O
IBM	B-Device
Model	I-Device
M	I-Device
keyboard	I-Device
with	O
a	O
detachable	O
cable	O
,	O
on	O
the	O
IBM	O
SurePos	O
line	O
of	O
devices	O
,	O
and	O
on	O
HP	B-Device
HIL	I-Device
devices	O
(	O
such	O
as	O
keyboards	O
and	O
mice	O
)	O
.	O
</s>
<s>
Some	O
of	O
the	O
SDL	B-Protocol
connectors	I-Protocol
are	O
still	O
manufactured	O
but	O
are	O
no	O
longer	O
common	O
on	O
consumer	O
electronic	O
devices	O
.	O
</s>
