<s>
A	O
context-sensitive	B-Application
user	I-Application
interface	I-Application
offers	O
the	O
user	O
options	O
based	O
on	O
the	O
state	O
of	O
the	O
active	O
program	O
.	O
</s>
<s>
Context	O
sensitivity	O
is	O
ubiquitous	O
in	O
current	O
graphical	B-Application
user	I-Application
interfaces	I-Application
,	O
often	O
in	O
context	O
menus	O
.	O
</s>
<s>
A	O
poor	O
implementation	O
can	O
be	O
more	O
annoying	O
than	O
helpful	O
–	O
a	O
classic	O
example	O
of	O
this	O
is	O
Office	B-General_Concept
Assistant	I-General_Concept
.	O
</s>
<s>
The	O
method	O
is	O
not	O
only	O
limited	O
to	O
the	O
response	O
to	O
imperative	B-Application
button	O
presses	O
and	O
mouse	O
clicks	O
-	O
pop-up	O
menus	O
can	O
be	O
pruned	O
and/or	O
altered	O
,	O
or	O
a	O
web	O
search	O
can	O
focus	O
results	O
based	O
on	O
previous	O
searches	O
.	O
</s>
<s>
At	O
higher	O
levels	O
of	O
implementation	O
context	O
sensitive	O
actions	O
require	O
either	O
larger	O
amounts	O
of	O
meta-data	O
,	O
extensive	O
case	B-General_Concept
analysis	I-General_Concept
based	O
programming	O
,	O
or	O
other	O
artificial	B-Application
intelligence	I-Application
algorithms	O
.	O
</s>
<s>
Context	O
sensitivity	O
is	O
important	O
in	O
video	O
games	O
–	O
especially	O
those	O
controlled	O
by	O
a	O
gamepad	B-Device
,	O
joystick	B-Device
or	O
computer	B-Device
mouse	I-Device
in	O
which	O
the	O
number	O
of	O
buttons	O
available	O
is	O
limited	O
.	O
</s>
<s>
A	O
similar	O
range	O
of	O
use	O
is	O
found	O
in	O
the	O
'	O
action	B-Device
button	I-Device
 '	O
which	O
,	O
depending	O
upon	O
the	O
in-game	O
position	O
of	O
the	O
player	O
's	O
character	O
,	O
may	O
cause	O
it	O
to	O
pick	O
something	O
up	O
,	O
open	O
a	O
door	O
,	O
grab	O
a	O
rope	O
,	O
punch	O
a	O
monster	O
or	O
opponent	O
,	O
or	O
smash	O
an	O
object	O
.	O
</s>
