<s>
FBReader	B-Language
is	O
an	O
e-book	O
reader	O
for	O
Linux	B-Application
,	O
Microsoft	B-Application
Windows	I-Application
,	O
Android	B-Application
,	O
and	O
other	O
platforms	O
.	O
</s>
<s>
It	O
was	O
originally	O
written	O
for	O
the	O
Sharp	B-Operating_System
Zaurus	I-Operating_System
and	O
currently	O
runs	O
on	O
many	O
other	O
mobile	B-Application
devices	I-Application
,	O
like	O
the	O
Nokia	B-Device
Internet	I-Device
Tablets	I-Device
,	O
as	O
well	O
as	O
desktop	B-Device
computers	I-Device
.	O
</s>
<s>
A	O
preview	O
of	O
FBReaderJ	O
(	O
the	O
Java	B-Language
port	O
)	O
for	O
Google	B-Application
Android	I-Application
was	O
released	O
on	O
April	O
13	O
,	O
2008	O
.	O
</s>
<s>
Supported	O
formats	O
include	O
EPUB	O
,	O
FictionBook	O
,	O
HTML	B-Language
,	O
plucker	B-Application
,	O
PalmDoc	O
,	O
zTxt	O
,	O
TCR	O
,	O
CHM	B-Protocol
,	O
RTF	O
,	O
OEB	O
,	O
mobi	O
without	O
DRM	O
,	O
and	O
plain-text	O
.	O
</s>
<s>
It	O
was	O
formerly	O
free	B-Application
software	I-Application
under	O
the	O
GPL	B-License
,	O
but	O
since	O
2015	O
(	O
v2.7	O
)	O
is	O
proprietary	O
software	O
.	O
</s>
<s>
Nikolay	O
Pultsin	O
wrote	O
the	O
first	O
FBReader	B-Language
;	O
the	O
tool	O
was	O
released	O
for	O
the	O
Sharp	B-Operating_System
Zaurus	I-Operating_System
in	O
January	O
2005	O
,	O
a	O
Maemo	B-Operating_System
port	O
was	O
added	O
in	O
December	O
2005	O
for	O
the	O
Nokia	B-Application
770	I-Application
.	O
</s>
<s>
FBReader	B-Language
has	O
since	O
had	O
binary	O
packages	O
released	O
for	O
many	O
mobile-device	O
platforms	O
and	O
for	O
most	O
major	O
personal	O
computer	O
operating	O
systems	O
.	O
</s>
<s>
The	O
FBReader	B-Language
name	O
with	O
the	O
FB	O
prefix	O
comes	O
from	O
FictionBook	O
,	O
an	O
e-book	O
format	O
popular	O
in	O
Russia	O
,	O
the	O
country	O
of	O
FBReader	B-Language
's	O
author	O
.	O
</s>
<s>
The	O
original	O
FBReader	B-Language
was	O
written	O
in	O
C++	B-Language
;	O
however	O
,	O
in	O
2007	O
a	O
fork	O
called	O
FBReaderJ	O
was	O
created	O
,	O
which	O
was	O
written	O
in	O
Java	B-Language
.	O
</s>
<s>
As	O
the	O
Android	B-Application
platform	I-Application
became	O
available	O
in	O
the	O
following	O
years	O
,	O
this	O
fork	O
became	O
the	O
codebase	O
for	O
the	O
Android	B-Application
software	I-Application
application	O
,	O
while	O
the	O
C++	B-Language
codebase	O
remained	O
in	O
use	O
for	O
other	O
platforms	O
.	O
</s>
<s>
The	O
Android	B-Application
app	O
was	O
split	O
into	O
Free	O
and	O
Premium	O
versions	O
,	O
both	O
closed-source	O
,	O
with	O
the	O
Premium	O
version	O
adding	O
integrated	O
support	O
for	O
PDF	B-Application
and	O
for	O
machine	B-Application
translation	I-Application
.	O
</s>
<s>
For	O
easy	O
cross-platform	B-Operating_System
compiling	O
,	O
FBReader	B-Language
uses	O
zlibrary	O
,	O
a	O
cross-platform	B-Operating_System
interface	O
library	O
.	O
</s>
<s>
It	O
allows	O
recompiling	O
for	O
many	O
platforms	O
while	O
disregarding	O
the	O
GUI-toolkit	B-Library
used	O
.	O
</s>
<s>
support	O
Multiple	O
book	O
tar	B-Application
,	O
ZIP	B-General_Concept
,	O
GZIP	B-Application
and	O
BZIP2	B-Application
archives	O
.	O
</s>
<s>
FBReader	B-Language
supports	O
the	O
following	O
file	O
formats	O
:	O
</s>
<s>
PDF	B-Application
:	O
</s>
<s>
Plucker	B-Application
:	O
</s>
<s>
mobile	O
Linux	B-Application
devices	O
:	O
</s>
<s>
Sharp	B-Operating_System
Zaurus	I-Operating_System
with	O
Qtopia-based	O
ROMs	O
,	O
pdaXrom	O
or	O
OpenZaurus	O
ROM	O
.	O
</s>
<s>
Nokia	O
//	O
Nokia	B-Device
Internet	I-Device
tablets	I-Device
(	O
)	O
.	O
</s>
<s>
Pepper	B-Device
Pad	I-Device
3	O
.	O
</s>
