<s>
LOCK	O
is	O
a	O
function	O
that	O
locks	O
part	O
of	O
a	O
keyboard	B-Device
's	I-Device
keys	O
into	O
a	O
distinct	O
mode	B-General_Concept
of	I-General_Concept
operation	I-General_Concept
,	O
depending	O
on	O
the	O
lock	O
settings	O
selected	O
.	O
</s>
<s>
Most	O
keyboards	B-Device
have	O
three	O
different	O
types	O
of	O
lock	O
functions	O
:	O
</s>
<s>
Number	B-Device
Lock	I-Device
Num	B-Device
Lock	I-Device
.	O
</s>
<s>
Allows	O
the	O
user	O
to	O
type	O
numbers	O
by	O
pressing	O
the	O
keys	O
on	O
the	O
number	B-Device
pad	I-Device
,	O
rather	O
than	O
having	O
them	O
act	O
as	O
up	O
,	O
down	O
,	O
left	O
,	O
right	O
,	O
page	O
up	O
,	O
end	O
,	O
and	O
so	O
forth	O
.	O
</s>
<s>
Usually	O
located	O
in	O
the	O
upper	O
left	O
corner	O
of	O
the	O
number	B-Device
pad	I-Device
.	O
</s>
<s>
Capital	O
Lock	O
Caps	B-Device
Lock	I-Device
.	O
</s>
<s>
Located	O
at	O
left	O
end	O
of	O
the	O
keyboard	B-Device
,	O
above	O
the	O
left	B-Device
shift	I-Device
key	I-Device
.	O
</s>
<s>
Also	O
while	O
Caps	B-Device
Lock	I-Device
is	O
engaged	O
,	O
typically	O
the	O
shift	B-Device
key	I-Device
instead	O
adjusts	O
the	O
now-capital	O
letter	O
keys	O
to	O
type	O
in	O
lowercase	O
.	O
</s>
<s>
Scrolling	O
Lock	O
Scroll	B-Device
Lock	I-Device
.	O
</s>
<s>
In	O
some	O
applications	O
,	O
such	O
as	O
spreadsheets	B-Application
,	O
the	O
lock	O
mode	O
is	O
used	O
to	O
change	O
the	O
behavior	O
of	O
the	O
cursor	B-Device
keys	I-Device
to	O
scroll	O
the	O
document	O
instead	O
of	O
the	O
cursor	B-Application
.	O
</s>
<s>
Usually	O
located	O
to	O
the	O
right	O
of	O
the	O
function	B-Application
keys	I-Application
.	O
</s>
<s>
Some	O
laptops	O
and	O
compact	O
keyboards	B-Device
also	O
have	O
a	O
Function	O
Lock	O
-	O
FN	B-Device
Lock	I-Device
.	O
</s>
<s>
On	O
these	O
devices	O
,	O
a	O
Fn	O
modifier	O
key	O
is	O
used	O
to	O
combine	O
keys	O
to	O
save	O
room	O
and	O
add	O
non-standard	O
functionality	O
;	O
a	O
common	O
use	O
is	O
merging	O
the	O
row	O
with	O
keys	O
F1	B-Application
-	I-Application
F12	I-Application
with	O
keys	O
that	O
adjust	O
settings	O
such	O
as	O
display	O
brightness	O
,	O
media	O
volume	O
and	O
playback	O
,	O
and	O
keyboard	B-Device
illumination	O
.	O
</s>
<s>
Fn	B-Device
Lock	I-Device
toggles	O
the	O
default	O
output	O
of	O
these	O
keys	O
.	O
</s>
<s>
The	O
lock	B-Device
keys	I-Device
are	O
scattered	O
around	O
the	O
keyboard	B-Device
.	O
</s>
<s>
Most	O
styles	O
of	O
keyboards	B-Device
have	O
three	O
LEDs	O
indicating	O
which	O
locks	O
are	O
enabled	O
,	O
in	O
the	O
upper	O
right	O
corner	O
above	O
the	O
numpad	B-Device
.	O
</s>
<s>
Some	O
ergonomic	O
keyboards	B-Device
instead	O
place	O
the	O
lock	O
indicators	O
in	O
between	O
the	O
key	O
split	O
.	O
</s>
<s>
Some	O
brands	O
of	O
keyboards	B-Device
have	O
a	O
function	B-Device
mode	I-Device
key	I-Device
(	O
also	O
called	O
F	B-Device
mode	I-Device
or	O
Office	B-Device
Lock	I-Device
)	O
,	O
and	O
may	O
replace	O
the	O
scroll	B-Device
lock	I-Device
indicator	O
with	O
an	O
office	B-Device
lock	I-Device
indicator	O
.	O
</s>
<s>
Office	B-Device
Lock	I-Device
,	O
when	O
enabled	O
,	O
will	O
enable	O
alternate	O
functions	O
of	O
the	O
function	B-Application
keys	I-Application
,	O
meant	O
for	O
use	O
with	O
various	O
word	B-General_Concept
processing	I-General_Concept
or	O
email	O
programs	O
.	O
</s>
