<s>
A	O
keyboard	B-Device
protector	I-Device
or	O
keyboard	B-Device
cover	I-Device
is	O
a	O
device	O
which	O
is	O
placed	O
on	O
top	O
of	O
a	O
computer	B-Device
keyboard	I-Device
in	O
order	O
to	O
reduce	O
contact	O
with	O
the	O
environment	O
.	O
</s>
<s>
Keyboards	B-Device
are	O
susceptible	O
to	O
corrosion	O
damage	O
from	O
liquid	O
spills	O
and	O
build	O
up	O
of	O
dust	O
and	O
debris	O
,	O
requiring	O
frequent	O
cleaning	O
and	O
maintenance	O
.	O
</s>
<s>
A	O
keyboard	B-Device
protector	I-Device
is	O
usually	O
made	O
from	O
plastic	O
,	O
polyurethane	O
or	O
silicone	O
.	O
</s>
<s>
It	O
is	O
in	O
the	O
form	O
of	O
a	O
flexible	O
sheet	O
,	O
moulded	O
to	O
fit	O
the	O
key	O
profiles	O
and	O
arrangements	O
on	O
the	O
keyboard	B-Device
.	O
</s>
<s>
A	O
keyboard	B-Device
protector	I-Device
is	O
placed	O
on	O
top	O
of	O
a	O
keyboard	B-Device
,	O
acting	O
as	O
a	O
physical	O
barrier	O
to	O
the	O
environment	O
.	O
</s>
<s>
Some	O
models	O
of	O
have	O
the	O
sides	O
of	O
the	O
protector	O
extend	O
to	O
the	O
underside	O
of	O
the	O
keyboard	B-Device
,	O
which	O
are	O
secured	O
with	O
adhesive	O
tape	O
.	O
</s>
<s>
Computer	O
users	O
who	O
are	O
unfamiliar	O
with	O
keyboard	B-Device
protectors	I-Device
may	O
take	O
some	O
time	O
to	O
become	O
accustomed	O
,	O
since	O
the	O
keystrokes	O
are	O
dampened	O
and	O
the	O
force	O
needed	O
to	O
depress	O
the	O
keys	O
is	O
different	O
.	O
</s>
<s>
Since	O
there	O
are	O
several	O
major	O
types	O
of	O
keyboards	B-Device
in	O
the	O
market	O
,	O
some	O
with	O
different	O
layouts	O
,	O
the	O
compatibility	O
of	O
keyboard	B-Device
protectors	I-Device
is	O
also	O
important	O
in	O
order	O
to	O
have	O
the	O
keyboard	B-Device
fully	O
and	O
well	O
protected	O
.	O
</s>
<s>
Different	O
keyboards	B-Device
will	O
often	O
feature	O
slightly	O
different	O
key	O
spacing	O
or	O
arrangement	O
,	O
leading	O
to	O
ill-fitting	O
protectors	O
.	O
</s>
