<s>
Multi-pointer	B-Device
X	I-Device
(	O
MPX	O
)	O
is	O
a	O
part	O
of	O
X	B-Operating_System
input	O
extension	O
and	O
previously	O
a	O
modification	O
to	O
the	O
existing	O
X.Org	B-Operating_System
implementation	O
of	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
.	O
</s>
<s>
MPX	O
provides	O
multiple	O
independent	O
pointers	O
at	O
the	O
windowing	B-Application
system	I-Application
level	O
.	O
</s>
<s>
Unlike	O
many	O
other	O
multi-pointer	O
applications	B-Application
and	O
toolkits	B-Library
,	O
MPX	O
allows	O
many	O
existing	O
X11	B-Operating_System
applications	B-Application
to	O
run	O
unmodified	O
,	O
whilst	O
still	O
providing	O
additional	O
input	O
features	O
.	O
</s>
<s>
For	O
instance	O
,	O
multiple	O
users	O
can	O
simultaneously	O
operate	O
different	O
applications	B-Application
at	O
the	O
same	O
time	O
.	O
</s>
<s>
Some	O
applications	B-Application
do	O
not	O
work	O
as	O
expected	O
due	O
to	O
limitations	O
in	O
the	O
toolkits	B-Library
they	O
use	O
.	O
</s>
<s>
Combined	O
with	O
the	O
proof	O
of	O
concept	O
window	O
manager	O
MPWM	O
,	O
MPX	O
provides	O
extended	O
features	O
such	O
as	O
simultaneous	O
movement	O
or	O
resizing	O
of	O
application	O
windows	O
,	O
per	O
pointer	O
annotation	O
over	O
top	O
of	O
an	O
application	O
and	O
restricted	O
input	O
support	O
(	O
floor	B-Protocol
control	I-Protocol
)	O
.	O
</s>
<s>
Applications	B-Application
that	O
are	O
aware	O
of	O
the	O
extra	O
pointers	O
are	O
also	O
able	O
to	O
make	O
use	O
of	O
them	O
,	O
such	O
as	O
two	O
handed	O
drawing	O
.	O
</s>
<s>
MPX	O
was	O
merged	O
into	O
the	O
current	O
development	O
version	O
of	O
X.Org	B-Operating_System
on	O
26	O
May	O
2008	O
.	O
</s>
<s>
Xinput2	O
(	O
XI2	O
)	O
,	O
which	O
is	O
the	O
second	O
official	O
stable	O
API	O
release	O
of	O
the	O
X	B-Operating_System
input	O
extension	O
,	O
contains	O
MPX	O
and	O
was	O
merged	O
into	O
the	O
current	O
development	O
version	O
of	O
X.Org	B-Operating_System
on	O
3	O
June	O
2009	O
,	O
and	O
released	O
as	O
part	O
of	O
the	O
XServer	B-Operating_System
1.7	I-Operating_System
on	O
2	O
October	O
2009	O
.	O
</s>
