<s>
In	O
computing	O
,	O
focus	O
indicates	O
the	O
act	O
of	O
selecting	O
an	O
element	O
of	O
a	O
graphical	B-Application
user	I-Application
interface	I-Application
.	O
</s>
<s>
Text	O
entered	O
at	O
the	O
keyboard	B-Device
or	O
pasted	O
from	O
a	O
clipboard	O
is	O
sent	O
to	O
the	O
component	O
which	O
has	O
the	O
focus	O
.	O
</s>
<s>
The	O
concept	O
is	O
similar	O
to	O
a	O
cursor	B-Application
in	O
a	O
text-based	O
environment	O
.	O
</s>
<s>
However	O
,	O
when	O
considering	O
a	O
graphical	B-Application
interface	I-Application
,	O
there	O
is	O
also	O
a	O
mouse	O
pointer	O
involved	O
.	O
</s>
<s>
Many	O
desktops	O
also	O
allow	O
the	O
focus	O
to	O
be	O
changed	O
with	O
the	O
keyboard	B-Device
.	O
</s>
<s>
When	O
graphical	B-Application
interfaces	I-Application
were	O
first	O
introduced	O
,	O
many	O
computers	O
did	O
not	O
have	O
mice	O
,	O
so	O
this	O
alternative	O
was	O
necessary	O
.	O
</s>
<s>
In	O
certain	O
circumstances	O
,	O
the	O
arrow	B-Device
keys	I-Device
can	O
also	O
be	O
used	O
to	O
move	O
focus	O
.	O
</s>
<s>
The	O
behaviour	O
of	O
focus	O
on	O
one	O
's	O
desktop	O
can	O
be	O
governed	O
by	O
policies	O
in	O
window	B-Application
management	I-Application
.	O
</s>
<s>
On	O
most	O
mainstream	O
user-interfaces	O
,	O
such	O
as	O
ones	O
made	O
by	O
Microsoft	O
and	O
Apple	O
,	O
it	O
is	O
common	O
to	O
find	O
a	O
"	O
focus	O
follows	O
click	O
"	O
policy	O
(	O
or	O
"	O
click	B-Application
to	I-Application
focus	I-Application
"	O
)	O
,	O
where	O
one	O
must	O
click	O
the	O
mouse	O
inside	O
of	O
the	O
window	O
for	O
that	O
window	O
to	O
gain	O
focus	O
.	O
</s>
<s>
Another	O
common	O
policy	O
on	O
Unix	B-Application
systems	I-Application
using	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
(	O
X11	B-Operating_System
)	O
is	O
the	O
"	O
focus	B-Application
follows	I-Application
mouse	I-Application
"	O
policy	O
(	O
or	O
FFM	O
)	O
,	O
where	O
the	O
focus	O
automatically	O
follows	O
the	O
current	O
placement	O
of	O
the	O
pointer	O
.	O
</s>
<s>
Window	B-Application
managers	I-Application
with	O
this	O
policy	O
usually	O
offer	O
"	O
autoraise	O
,	O
"	O
which	O
raises	O
the	O
window	O
when	O
it	O
is	O
focused	O
,	O
typically	O
after	O
a	O
configurable	O
short	O
delay	O
.	O
</s>
<s>
When	O
text	O
is	O
entered	O
into	O
the	O
component	O
,	O
it	O
will	O
appear	O
at	O
the	O
position	O
of	O
the	O
text-cursor	O
,	O
which	O
will	O
also	O
normally	O
be	O
movable	O
using	O
the	O
mouse	O
pointer	O
.	O
</s>
