<s>
The	O
Netscape	B-Application
Public	I-Application
License	I-Application
(	O
NPL	O
)	O
is	O
a	O
free	B-License
software	I-License
license	I-License
,	O
the	O
license	O
under	O
which	O
Netscape	B-Protocol
Communications	O
Corporation	O
originally	O
released	O
Mozilla	B-Operating_System
.	O
</s>
<s>
Its	O
most	O
notable	O
feature	O
is	O
that	O
it	O
gives	O
the	O
original	O
developer	O
of	O
Mozilla	B-Operating_System
(	O
Netscape	B-Protocol
,	O
now	O
a	O
subsidiary	O
of	O
AOL	O
)	O
,	O
the	O
right	O
to	O
distribute	O
modifications	O
made	O
by	O
other	O
contributors	O
under	O
whatever	O
terms	O
it	O
desires	O
,	O
including	O
proprietary	B-Application
terms	O
,	O
without	O
granting	O
similar	O
rights	O
to	O
these	O
other	O
contributors	O
in	O
respect	O
to	O
contributions	O
made	O
by	O
the	O
original	O
developer	O
.	O
</s>
<s>
This	O
allowed	O
the	O
release	O
of	O
the	O
Netscape	B-Protocol
6	O
and	O
later	O
versions	O
as	O
proprietary	B-Application
software	I-Application
.	O
</s>
<s>
This	O
asymmetry	O
with	O
respect	O
to	O
rights	O
has	O
led	O
to	O
criticism	O
of	O
the	O
license	O
by	O
many	O
members	O
of	O
the	O
open	O
source	O
and	O
free	B-Application
software	I-Application
movements	O
:	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
acknowledged	O
it	O
as	O
a	O
free-software	B-License
license	I-License
but	O
one	O
to	O
be	O
avoided	O
,	O
and	O
the	O
Open	O
Source	O
Initiative	O
either	O
rejected	O
it	O
entirely	O
or	O
was	O
not	O
asked	O
to	O
review	O
it	O
.	O
</s>
<s>
The	O
FSF	O
adds	O
that	O
it	O
's	O
not	O
possible	O
to	O
combine	O
software	O
obtained	O
under	O
the	O
license	O
with	O
software	O
obtained	O
under	O
the	O
GPL	B-License
.	O
</s>
<s>
The	O
Mozilla	B-License
Public	I-License
License	I-License
version	O
1.1	O
is	O
similar	O
(	O
and	O
has	O
limited	O
"	O
file-level	O
copyleft	B-License
"	O
)	O
,	O
but	O
lacks	O
the	O
asymmetry	O
in	O
rights	O
.	O
</s>
<s>
Time	O
Warner	O
,	O
exercising	O
its	O
rights	O
under	O
the	O
Netscape	B-Application
Public	I-Application
License	I-Application
,	O
and	O
at	O
the	O
request	O
of	O
the	O
Mozilla	B-Operating_System
Foundation	O
,	O
relicensed	O
all	O
code	O
in	O
Mozilla	B-Operating_System
that	O
was	O
under	O
the	O
Netscape	B-Application
Public	I-Application
License	I-Application
(	O
including	O
code	O
by	O
other	O
contributors	O
)	O
to	O
an	O
MPL	O
1.1/GPL	O
2.0/LGPL	O
2.1	O
tri-license	B-License
,	O
thus	O
removing	O
the	O
GPL-incompatibility	O
.	O
</s>
