<s>
A	O
dual-touchscreen	B-Device
is	O
a	O
computer	O
or	O
phone	O
display	O
setup	O
which	O
uses	O
two	O
screens	O
,	O
either	O
or	O
both	O
of	O
which	O
could	O
be	O
touch-capable	O
,	O
to	O
display	O
both	O
elements	O
of	O
the	O
computer	O
's	O
graphical	O
user	O
interface	O
and	O
virtualized	O
implementations	O
of	O
common	O
input	O
devices	O
,	O
including	O
virtual	B-Device
keyboards	I-Device
.	O
</s>
<s>
Usually	O
,	O
in	O
a	O
dual-touchscreen	B-Device
computer	O
or	O
computing	O
device	O
,	O
the	O
most	O
persistent	O
GUI	O
elements	O
and	O
functions	O
are	O
displayed	O
on	O
one	O
,	O
hand-accessible	O
touchscreen	O
(	O
changing	O
with	O
the	O
software	O
application	O
in	O
use	O
)	O
alongside	O
the	O
virtual	B-Device
keyboard	I-Device
,	O
while	O
the	O
other	O
,	O
more	O
optically-centric	O
display	O
is	O
used	O
for	O
those	O
user	O
interface	O
elements	O
which	O
are	O
either	O
less	O
or	O
never	O
accessed	O
by	O
user-generated	O
behaviors	O
.	O
</s>
<s>
This	O
approach	O
is	O
similar	O
to	O
that	O
of	O
the	O
Nintendo	B-Device
DS	I-Device
handheld	O
game	O
console	O
's	O
construction	O
,	O
in	O
which	O
user-generated	O
actions	O
are	O
initialized	O
on	O
the	O
lower	O
resistive	O
touchscreen	O
while	O
the	O
resulting	O
graphical	O
displays	O
are	O
executed	O
in	O
the	O
upper	O
screen	O
.	O
</s>
<s>
The	O
same	O
approach	O
was	O
adopted	O
on	O
its	O
successor	O
unit	O
,	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
and	O
a	O
similar	O
concept	O
was	O
created	O
for	O
Nintendo	O
's	O
eleventh	O
home	O
console	O
,	O
the	O
Wii	B-Device
U	I-Device
,	O
with	O
its	O
controller	O
's	O
resistive	O
touchscreen	O
used	O
in	O
the	O
same	O
fashion	O
as	O
the	O
lower	O
part	O
of	O
the	O
DS/3DS	O
,	O
and	O
the	O
secondary	O
screen	O
connected	O
to	O
the	O
console	O
.	O
</s>
<s>
In	O
2004	O
,	O
Italian	O
design	O
firm	O
V12	O
Design	O
designed	O
a	O
prototype	O
dual-touchscreen	B-Device
laptop	B-Device
known	O
as	O
the	O
Canova	O
.	O
</s>
<s>
In	O
2007	O
,	O
Pennsylvania-based	O
company	O
Estari	O
released	O
its	O
2-VU	O
laptop	B-Device
,	O
initially	O
for	O
the	O
United	O
States	O
military	O
before	O
a	O
public	O
release	O
.	O
</s>
<s>
In	O
2008	O
,	O
the	O
OLPC	O
XO-2	O
was	O
announced	O
to	O
use	O
a	O
dual-touchscreen	B-Device
setup	O
.	O
</s>
<s>
In	O
May	O
2009	O
,	O
The	O
Asus	O
Flipbook	O
was	O
first	O
demonstrated	O
,	O
at	O
CeBIT	O
as	O
a	O
dual-touchscreen	B-Device
laptop	B-Device
with	O
the	O
ability	O
to	O
optionally	O
display	O
user	O
interface	O
elements	O
in	O
both	O
screens	O
both	O
horizontally	O
and	O
vertically	O
;	O
the	O
concept	O
design	O
was	O
renamed	O
as	O
the	O
Asus	O
"	O
Eee	O
Reader	B-General_Concept
"	O
,	O
rebranded	O
as	O
an	O
e-book	O
reader	B-General_Concept
,	O
and	O
scheduled	O
for	O
launch	O
in	O
Q4	O
2009	O
.	O
</s>
<s>
The	O
device	O
was	O
finally	O
renamed	O
as	O
"	O
Eee	O
Book	O
"	O
and	O
scheduled	O
for	O
a	O
June	O
2010	O
release	O
at	O
Computex	O
in	O
Taipei	B-Application
.	O
</s>
<s>
In	O
March	O
2010	O
,	O
the	O
EnTourage	B-Application
eDGe	I-Application
was	O
released	O
,	O
also	O
directed	O
more	O
as	O
e-reader	O
than	O
as	O
computer	O
.	O
</s>
<s>
One	O
of	O
the	O
two	O
touchscreens	O
is	O
monochrome	O
E	O
Ink	O
,	O
the	O
other	O
is	O
color	O
liquid	B-Device
crystal	I-Device
display	I-Device
(	O
LCD	B-Device
)	O
.	O
</s>
<s>
In	O
January	O
2010	O
,	O
Micro-Star	O
International	O
(	O
MSI	O
)	O
showed	O
a	O
prototype	O
of	O
a	O
dual-touchscreen	B-Device
netbook	O
at	O
Consumer	O
Electronics	O
Show	O
(	O
CES	O
)	O
.	O
</s>
<s>
In	O
June	O
2010	O
,	O
Toshiba	O
released	O
the	O
Libretto	B-Device
W100	I-Device
dual-touchscreen	B-Device
notebook	B-Device
running	O
Windows	B-Device
7	I-Device
.	O
</s>
<s>
In	O
January	O
2011	O
,	O
NEC	O
announced	O
the	O
LT-W	O
Cloud	O
Communicator	O
,	O
a	O
slate	O
with	O
dual	O
touchscreens	O
that	O
unfolds	O
like	O
a	O
book	O
and	O
runs	O
Android	B-Application
2.1	O
.	O
</s>
<s>
In	O
March	O
2011	O
,	O
Acer	O
released	O
the	O
Iconia	B-Device
6120	I-Device
dual-screen	O
touchbook	O
notebook	B-Device
running	O
Windows	B-Device
7	I-Device
.	O
</s>
<s>
In	O
April	O
2011	O
,	O
Kyocera	O
International	O
released	O
the	O
Kyocera	B-Application
Echo	I-Application
smartphone	O
running	O
Android	B-Application
2.2	I-Application
Froyo	B-Application
.	O
</s>
<s>
In	O
April	O
2011	O
,	O
Sony	O
announced	O
the	O
code-named	O
S2	O
,	O
since	O
renamed	O
Sony	B-Application
Tablet	I-Application
P	I-Application
,	O
running	O
Android	B-Application
3.1	I-Application
Honeycomb	I-Application
,	O
and	O
scheduled	O
for	O
release	O
in	O
autumn	O
2011	O
.	O
</s>
<s>
In	O
April	O
2013	O
,	O
NEC	O
released	O
the	O
Medias	O
W	O
N-05E	O
smartphone	O
running	O
Android	B-Application
4.1	I-Application
Jelly	B-Application
Bean	I-Application
.	O
</s>
<s>
In	O
October	O
2017	O
,	O
ZTE	O
announced	O
the	O
ZTE	O
Axon	O
M	O
smartphone	O
running	O
Android	B-Application
7.1	I-Application
Nougat	B-Application
.	O
</s>
<s>
In	O
2018	O
,	O
Lenovo	O
released	O
the	O
Yoga	O
Book	O
C930	O
,	O
featuring	O
one	O
IPS	B-Architecture
display	I-Architecture
and	O
one	O
E	O
Ink	O
display	O
.	O
</s>
<s>
In	O
February	O
2019	O
,	O
LG	O
announced	O
an	O
optional	O
second	O
screen	O
for	O
the	O
LG	B-Application
V50	I-Application
.	O
</s>
<s>
In	O
March	O
2019	O
,	O
Samsung	O
Electronics	O
announced	O
a	O
dual-touchscreen	B-Device
foldable	B-Application
smartphone	I-Application
:	O
the	O
Samsung	B-Application
Galaxy	I-Application
Fold	I-Application
.	O
</s>
<s>
In	O
October	O
2019	O
,	O
Microsoft	O
announced	O
two	O
dual-screen	O
devices	O
:	O
the	O
Surface	B-Application
Duo	I-Application
and	O
Surface	B-Device
Neo	I-Device
.	O
</s>
<s>
The	O
Surface	B-Application
Duo	I-Application
launched	O
on	O
10	O
September	O
2020	O
.	O
</s>
<s>
In	O
October	O
2020	O
,	O
LG	O
released	O
the	O
LG	B-Application
Wing	I-Application
running	O
Android	B-Application
10	I-Application
.	O
</s>
<s>
In	O
September	O
2021	O
,	O
Microsoft	O
released	O
the	O
Surface	B-Application
Duo	I-Application
2	O
running	O
Android	B-Application
11	I-Application
.	O
</s>
<s>
in	O
January	O
2023	O
,	O
Lenovo	O
announced	O
the	O
Yoga	O
Book	O
9i	O
dual-touchscreen	B-Device
notebook	B-Device
running	O
Windows	B-Application
11	I-Application
.	O
</s>
