<s>
Nana	B-Language
is	O
a	O
cross-platform	B-Operating_System
C++	B-Language
library	O
for	O
creating	O
graphical	O
user	O
interfaces	O
.	O
</s>
<s>
It	O
uses	O
a	O
platform-independent	B-Operating_System
API	O
and	O
currently	O
supports	O
Windows	B-Application
,	O
Linux	B-Application
and	O
FreeBSD	B-Operating_System
.	O
</s>
<s>
Nana	B-Language
is	O
free	B-License
and	I-License
open-source	I-License
software	I-License
,	O
licensed	O
under	O
the	O
Boost	O
Software	O
License	O
.	O
</s>
<s>
Nana	B-Language
is	O
an	O
object-oriented	B-Language
widget	B-Library
toolkit	I-Library
using	O
generic	B-Language
programming	I-Language
and	O
written	O
in	O
Standard	O
C++	B-Language
.	O
</s>
<s>
It	O
can	O
therefore	O
be	O
compiled	O
by	O
any	O
Standard	O
C++	B-Language
compiler	O
(	O
VC2013	B-Application
,	O
GCC/MinGW	O
,	O
Clang	B-Application
)	O
.	O
</s>
<s>
The	O
primary	O
design	O
goal	O
of	O
Nana	B-Language
is	O
to	O
make	O
things	O
simple	O
and	O
intuitive	O
to	O
C++	B-Language
developers	O
:	O
it	O
therefore	O
uses	O
many	O
advanced	O
C++	B-Language
features	O
,	O
such	O
as	O
templates	O
,	O
standard	O
libraries	O
,	O
exception	O
and	O
RTTI	O
.	O
</s>
<s>
It	O
fully	O
supports	O
C++11	B-Language
since	O
2012	O
,	O
giving	O
the	O
developers	O
the	O
freedom	O
to	O
use	O
various	O
modern	O
C++	B-Language
features	O
such	O
as	O
lambda	O
functions	O
,	O
smart	O
pointers	O
and	O
the	O
standard	O
library	O
.	O
</s>
<s>
Nana	B-Language
was	O
written	O
in	O
C++	B-Language
and	O
targets	O
only	O
this	O
language	O
.	O
</s>
<s>
The	O
following	O
Nana	B-Language
example	O
creates	O
a	O
window	O
with	O
a	O
"	O
Hello	O
,	O
World	O
"	O
caption	O
and	O
a	O
"	O
Quit	O
"	O
button	O
:	O
</s>
<s>
In	O
2015	O
,	O
10	O
versions	O
1.x.x	O
were	O
released	O
.	O
</s>
<s>
Between	O
mid	O
2013	O
and	O
begin	O
2015	O
,	O
24	O
versions	O
0.x.x	O
were	O
released	O
,	O
.	O
</s>
