<s>
xCHM	B-Language
is	O
a	O
free	B-License
and	I-License
open-source	I-License
GUI	B-Application
front-end	O
for	O
CHMLIB	O
(	O
a	O
viewer	O
for	O
Microsoft	B-Protocol
Compressed	I-Protocol
HTML	I-Protocol
Help	I-Protocol
files	O
)	O
.	O
</s>
<s>
It	O
compiles	O
and	O
runs	O
on	O
Linux	B-Application
,	O
BSD	B-Operating_System
,	O
Mac	B-Application
OS	I-Application
X	I-Application
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
Pre-built	O
binaries	O
for	O
Mac	B-Application
OS	I-Application
X	I-Application
and	O
Microsoft	B-Application
Windows	I-Application
are	O
usually	O
available	O
for	O
download	O
from	O
the	O
project	O
's	O
website	O
.	O
</s>
