<s>
Chording	B-Device
means	O
pushing	O
several	O
keys	O
or	O
buttons	O
simultaneously	O
to	O
achieve	O
a	O
result	O
.	O
</s>
<s>
Chording	B-Device
,	O
with	O
a	O
chorded	B-Device
keyboard	I-Device
or	O
keyer	B-Device
allows	O
one	O
to	O
produce	O
as	O
many	O
characters	O
as	O
a	O
QWERTY	O
keyboard	O
but	O
with	O
fewer	O
keys	O
and	O
less	O
motion	O
per	O
finger	O
.	O
</s>
<s>
Mouse	B-Device
chording	B-Device
allows	O
a	O
user	O
to	O
use	O
a	O
two-button	O
mouse	B-Device
,	O
trackball	B-Device
,	O
or	O
touchpad	B-Application
as	O
if	O
it	O
where	O
a	O
three-button	O
device	O
.	O
</s>
<s>
For	O
example	O
,	O
in	O
the	O
Unix	B-Application
graphical	O
user	O
interface	O
(	O
known	O
as	O
X11	B-Operating_System
)	O
,	O
the	O
middle	O
button	O
is	O
used	O
to	O
paste	B-General_Concept
text	I-General_Concept
.	O
</s>
<s>
Since	O
Microsoft-type	O
mice	O
traditionally	O
only	O
had	O
two	O
buttons	O
,	O
users	O
of	O
Unix-type	O
systems	O
such	O
as	O
Linux	O
and	O
BSD	O
chord	O
the	O
right	O
and	O
left	O
buttons	O
to	O
paste	B-General_Concept
text	I-General_Concept
.	O
</s>
<s>
A	O
GKOS	O
chording	B-Device
keyboard	I-Device
application	O
development	O
for	O
iPhone	O
was	O
started	O
on	O
the	O
GKOS	O
Google	O
Group	O
on	O
May	O
25	O
,	O
2009	O
.	O
</s>
<s>
In	O
Minesweeper	B-Application
,	O
chording	B-Device
may	O
refer	O
to	O
a	O
tactic	O
which	O
is	O
traditionally	O
done	O
by	O
left-clicking	O
and	O
right-clicking	O
at	O
the	O
same	O
time	O
on	O
an	O
uncovered	O
square	O
to	O
uncover	O
all	O
eight	O
adjacent	O
squares	O
if	O
it	O
has	O
the	O
correct	O
number	O
of	O
flags	O
.	O
</s>
<s>
In	O
many	O
newer	O
versions	O
of	O
Minesweeper	B-Application
,	O
chording	B-Device
can	O
also	O
be	O
done	O
by	O
middle-clicking	O
or	O
by	O
simply	O
left-clicking	O
.	O
</s>
