<s>
Cybook	B-General_Concept
Gen3	I-General_Concept
is	O
a	O
6-inch	O
(	O
15.2cm	O
)	O
e-reader	O
for	O
reading	O
e-books	O
and	O
periodicals	O
,	O
and	O
it	O
can	O
be	O
used	O
to	O
listen	O
to	O
MP3	B-Application
and	O
audiobook	O
files	O
.	O
</s>
<s>
The	O
Cybook	B-General_Concept
Gen3	I-General_Concept
is	O
a	O
reading	O
device	O
based	O
on	O
E	O
Ink	O
screen	O
technology	O
.	O
</s>
<s>
The	O
Cybook	B-General_Concept
Gen3	I-General_Concept
reads	O
many	O
file	O
formats	O
and	O
offers	O
access	O
to	O
a	O
wide	O
range	O
of	O
digital	O
documents	O
.	O
</s>
<s>
A	O
Secure	B-Device
Digital	I-Device
card	I-Device
slot	O
allows	O
for	O
expanded	O
storage	O
.	O
</s>
<s>
To	O
a	O
host	O
computer	O
the	O
Cybook	B-General_Concept
Gen3	I-General_Concept
functions	O
as	O
a	O
typical	O
USB	B-Protocol
mass	O
storage	O
device	O
,	O
which	O
allows	O
for	O
copying	O
books	O
from	O
a	O
computer	O
.	O
</s>
<s>
For	O
this	O
reason	O
it	O
is	O
supported	O
on	O
all	O
major	O
operating	O
systems	O
,	O
including	O
Linux	B-Application
.	O
</s>
<s>
The	O
device	O
uses	O
TrueType	O
fonts	O
(	O
.ttf	O
)	O
,	O
and	O
can	O
also	O
be	O
used	O
as	O
an	O
image	O
viewer	O
to	O
display	O
JPEG	O
,	O
GIF	O
and	O
PNG	O
files	O
,	O
as	O
well	O
as	O
to	O
play	O
MP3	B-Application
files	I-Application
.	O
</s>
<s>
The	O
Cybook	B-General_Concept
Gen3	I-General_Concept
supports	O
PDF	B-Application
files	I-Application
,	O
however	O
it	O
does	O
n't	O
reflow	O
text	O
and	O
early	O
firmware	O
did	O
not	O
allow	O
zooming	O
in	O
on	O
documents	O
.	O
</s>
<s>
Current	O
firmware	O
revisions	O
support	O
ten	O
levels	O
of	O
zoom	O
and	O
allow	O
scrolling	O
around	O
the	O
page	O
,	O
making	O
the	O
device	O
suitable	O
for	O
reading	O
many	O
PDF	B-Application
files	I-Application
.	O
</s>
<s>
However	O
,	O
very	O
large	O
PDF	B-Application
files	I-Application
take	O
a	O
long	O
time	O
to	O
display	O
once	O
the	O
file	O
is	O
selected	O
.	O
</s>
<s>
Some	O
PDF	B-Application
files	I-Application
also	O
cause	O
the	O
firmware	O
to	O
crash	O
,	O
which	O
requires	O
a	O
hard	O
reset	O
by	O
pressing	O
the	O
small	O
button	O
on	O
the	O
back	O
side	O
.	O
</s>
<s>
The	O
Cybook	B-General_Concept
Gen3	I-General_Concept
runs	O
Linux	B-Application
as	O
its	O
underlying	O
operating	O
system	O
.	O
</s>
