<s>
The	O
Nook	B-Application
Tablet	I-Application
(	O
sometimes	O
styled	O
NOOK	B-Application
Tablet	I-Application
)	O
is	O
a	O
tablet	B-Device
e-reader/media	O
player	O
that	O
was	O
produced	O
and	O
marketed	O
by	O
Barnes	O
&	O
Noble	O
.	O
</s>
<s>
It	O
followed	O
the	O
Nook	B-Application
Color	I-Application
and	O
was	O
intended	O
to	O
compete	O
with	O
both	O
e-book	O
readers	O
and	O
tablet	B-Device
computers	I-Device
.	O
</s>
<s>
Barnes	O
&	O
Noble	O
announced	O
the	O
Nook	B-Application
Tablet	I-Application
16GB	O
version	O
on	O
November	O
7	O
,	O
2011	O
;	O
the	O
device	O
became	O
available	O
on	O
November	O
17	O
for	O
US$249	O
.	O
</s>
<s>
Barnes	O
&	O
Noble	O
released	O
the	O
Nook	B-Application
Tablet	I-Application
8GB	O
on	O
February	O
21	O
,	O
2012	O
.	O
</s>
<s>
Both	O
versions	O
have	O
a	O
7-inch	O
(	O
18cm	O
)	O
screen	O
,	O
a	O
microSDHC	B-Device
slot	O
compatible	O
with	O
cards	O
up	O
to	O
32GB	O
in	O
size	O
,	O
8	O
or	O
16GB	O
of	O
internal	O
storage	O
,	O
a	O
1GHz	O
dual-core	O
processor	O
,	O
and	O
a	O
FAT32	O
file	O
system	O
.	O
</s>
<s>
The	O
Nook	B-Application
Tablet	I-Application
models	O
were	O
discontinued	O
shortly	O
after	O
the	O
release	O
of	O
the	O
Nook	B-Application
HD	I-Application
and	O
Nook	B-Application
HD+	I-Application
.	O
</s>
<s>
According	O
to	O
estimates	O
by	O
Forrester	O
Research	O
,	O
about	O
5million	O
units	O
were	O
sold	O
by	O
mid-October	O
2012	O
,	O
making	O
the	O
Nook	B-Application
Tablet	I-Application
the	O
third	O
best	O
selling	O
tablet	B-Device
after	O
Apple	O
's	O
iPad	B-Device
and	O
Amazon	O
's	O
Kindle	B-Application
Fire	I-Application
in	O
2012	O
.	O
</s>
<s>
The	O
device	O
is	O
based	O
on	O
the	O
Nook	B-Application
Color	I-Application
design	O
by	O
Yves	O
Béhar	O
from	O
fuseproject	O
.	O
</s>
<s>
Barnes	O
&	O
Noble	O
announced	O
that	O
from	O
March	O
12	O
,	O
2012	O
,	O
users	O
could	O
bring	O
their	O
Nook	B-Application
Tablets	I-Application
16GB	O
into	O
stores	O
for	O
repartitioning	O
to	O
increase	O
the	O
internal	O
storage	O
for	O
sideloaded	O
content	O
.	O
</s>
<s>
On	O
August	O
12	O
,	O
2012	O
,	O
Barnes	O
&	O
Noble	O
lowered	O
the	O
price	O
to	O
US$199	O
to	O
compete	O
with	O
the	O
Kindle	B-Application
Fire	I-Application
.	O
</s>
<s>
On	O
February	O
22	O
,	O
2012	O
,	O
Barnes	O
&	O
Noble	O
released	O
the	O
Nook	B-Application
Tablet	I-Application
8GB	O
at	O
US	O
$199	O
to	O
compete	O
with	O
the	O
Kindle	B-Application
Fire	I-Application
.	O
</s>
<s>
Developers	O
have	O
found	O
means	O
to	O
root	B-Application
the	O
device	O
,	O
which	O
provides	O
access	O
to	O
hidden	O
files	O
and	O
settings	O
,	O
making	O
it	O
possible	O
to	O
run	O
apps	O
that	O
require	O
deep	O
access	O
to	O
a	O
file	O
system	O
or	O
make	O
changes	O
to	O
your	O
device	O
.	O
</s>
<s>
When	O
the	O
Nook	B-Application
Tablet	I-Application
was	O
first	O
offered	O
,	O
users	O
could	O
install	O
third-party	O
apps	O
.	O
</s>
<s>
However	O
,	O
days	O
before	O
Christmas	O
2011	O
,	O
the	O
forced	O
over-the-air	O
"	O
firmware	O
update	O
from	O
Barnes	O
&	O
Noble	O
for	O
the	O
Nook	B-Application
Tablet	I-Application
and	O
Nook	B-Application
Color	I-Application
—	O
1.4.1	O
—	O
close[d]	O
the	O
loophole	O
that	O
allowed	O
users	O
to	O
sideload	B-Protocol
any	O
Android	B-Application
app	O
and	O
also	O
 [ broke ] 	O
root	B-Application
for	O
those	O
who’[d]	O
gone	O
that	O
extra	O
step	O
to	O
customize	O
the	O
device	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
stock	O
firmware	O
provided	O
by	O
Barnes	O
and	O
Noble	O
,	O
the	O
Nook	B-Application
Tablet	I-Application
can	O
run	O
free	O
,	O
third-party	O
,	O
alternative	O
Android	B-Application
operating	I-Application
systems	I-Application
such	O
as	O
CyanogenMod	B-Application
.	O
</s>
<s>
These	O
replacement	O
distributions	O
typically	O
include	O
advanced	O
tablet	B-Device
features	O
such	O
as	O
overclocking	B-Application
,	O
a	O
regular	O
Android	B-Application
tablet	B-Device
interface	O
,	O
and	O
access	O
to	O
competing	O
app	O
and	O
content	O
stores	O
such	O
as	O
the	O
Google	B-Application
Play	I-Application
and	O
Amazon	O
Appstore	O
.	O
</s>
<s>
Alternative	O
operating	O
systems	O
may	O
be	O
run	O
either	O
from	O
the	O
emmc	O
or	O
via	O
a	O
microSD	B-Device
card	I-Device
,	O
which	O
allows	O
multi-booting	B-Operating_System
.	O
</s>
<s>
When	O
the	O
card	O
is	O
in	O
the	O
slot	O
,	O
the	O
Nook	B-Application
Tablet	I-Application
will	O
start	O
from	O
the	O
operating	O
system	O
on	O
the	O
SD	B-Device
card	I-Device
.	O
</s>
<s>
While	O
much	O
of	O
the	O
replacement	O
firmware	O
for	O
the	O
Nook	B-Application
Tablet	I-Application
is	O
available	O
via	O
free	O
downloads	O
,	O
and	O
instructions	O
are	O
readily	O
available	O
to	O
install	O
to	O
either	O
external	O
microSD	O
cards	O
or	O
internal	O
storage	O
,	O
pre-installed	O
versions	O
on	O
microSD	O
cards	O
are	O
also	O
available	O
for	O
sale	O
by	O
vendors	O
who	O
have	O
tested	O
and	O
developed	O
error-free	O
versions	O
and	O
instructions	O
for	O
the	O
free	O
software	O
and	O
offer	O
it	O
for	O
a	O
price	O
and	O
in	O
some	O
cases	O
,	O
along	O
with	O
customer	O
service	O
and	O
user	O
forums	O
.	O
</s>
