<s>
The	B-License
Unlicense	I-License
is	O
a	O
public	O
domain	O
equivalent	O
license	O
for	O
software	O
which	O
provides	O
a	O
public	O
domain	O
waiver	O
with	O
a	O
fall-back	O
public-domain-like	O
license	O
,	O
similar	O
to	O
the	O
CC	O
Zero	O
for	O
cultural	O
works	O
.	O
</s>
<s>
The	O
text	O
of	O
the	B-License
Unlicense	I-License
is	O
as	O
follows	O
:	O
</s>
<s>
The	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
states	O
that	O
"	O
Both	O
public	O
domain	O
works	O
and	O
the	O
lax	O
license	O
provided	O
by	O
the	B-License
Unlicense	I-License
are	O
compatible	O
with	O
the	O
GNU	O
GPL.	O
"	O
</s>
<s>
However	O
,	O
for	O
dedicating	O
software	O
to	O
the	O
public	O
domain	O
it	O
recommends	O
CC0	O
over	O
the	B-License
Unlicense	I-License
,	O
stating	O
that	O
CC0	O
"	O
is	O
more	O
thorough	O
and	O
mature	O
than	O
the	B-License
Unlicense	I-License
"	O
.	O
</s>
<s>
Google	B-Application
does	O
not	O
allow	O
contributions	O
to	O
projects	O
under	O
public	O
domain	O
equivalent	O
licenses	O
like	O
the	B-License
Unlicense	I-License
(	O
and	O
CC0	O
)	O
,	O
while	O
allowing	O
contributions	O
to	O
0BSD	O
licensed	O
and	O
US	O
government	O
PD	O
projects	O
.	O
</s>
<s>
Notable	O
projects	O
that	O
use	O
the	B-License
Unlicense	I-License
include	O
youtube-dl	B-Protocol
,	O
Second	B-Application
Reality	I-Application
,	O
and	O
the	O
source	O
code	O
of	O
the	O
1995	O
video	O
game	O
Gloom	B-Application
.	O
</s>
<s>
In	O
a	O
post	O
published	O
on	O
January	O
1	O
(	O
Public	O
Domain	O
Day	O
)	O
,	O
2010	O
,	O
Arto	B-License
Bendiken	I-License
,	O
the	O
author	O
of	O
the	B-License
Unlicense	I-License
,	O
outlined	O
his	O
reasons	O
for	O
preferring	O
public	O
domain	O
software	O
,	O
namely	O
:	O
the	O
nuisance	O
of	O
dealing	O
with	O
licensing	O
terms	O
(	O
for	O
instance	O
license	O
incompatibility	O
)	O
,	O
the	O
threat	O
inherent	O
in	O
copyright	O
law	O
,	O
and	O
the	O
impracticability	O
of	O
copyright	O
law	O
.	O
</s>
<s>
In	O
this	O
post	O
,	O
he	O
explained	O
that	O
the	B-License
Unlicense	I-License
is	O
based	O
on	O
the	O
copyright	O
waiver	O
of	O
SQLite	B-Language
with	O
the	O
no-warranty	O
statement	O
from	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
In	O
a	O
post	O
published	O
in	O
December	O
2010	O
,	O
Bendiken	O
further	O
clarified	O
what	O
it	O
means	O
to	O
"	O
license	O
"	O
and	O
"	O
unlicense	B-License
"	O
software	O
.	O
</s>
<s>
In	O
December	O
2010	O
,	O
Mike	O
Linksvayer	O
,	O
the	O
vice	O
president	O
of	O
Creative	O
Commons	O
at	O
the	O
time	O
,	O
wrote	O
in	O
an	O
identi.ca	B-Protocol
conversation	O
"	O
I	O
like	O
the	O
movement	O
"	O
in	O
speaking	O
of	O
the	B-License
Unlicense	I-License
effort	O
,	O
considering	O
it	O
compatible	O
with	O
the	O
goals	O
of	O
the	O
CC	O
Zero	O
(	O
CC0	O
)	O
license	O
,	O
released	O
in	O
2009	O
.	O
</s>
<s>
On	O
January	O
1	O
,	O
2011	O
,	O
Bendiken	O
reviewed	O
the	O
progress	O
and	O
adoption	O
of	O
the	B-License
Unlicense	I-License
,	O
saying	O
it	O
was	O
"	O
difficult	O
to	O
give	O
estimates	O
of	O
current	O
Unlicense	B-License
adoption	O
"	O
but	O
there	O
were	O
"	O
many	O
hundreds	O
of	O
projects	O
using	O
the	B-License
Unlicense	I-License
"	O
.	O
</s>
<s>
In	O
January	O
2012	O
,	O
when	O
discussed	O
on	O
OSI	O
's	O
license-review	O
mailing	O
list	O
,	O
the	B-License
Unlicense	I-License
was	O
brushed	O
off	O
as	O
a	O
crayon	O
license	O
.	O
</s>
<s>
In	O
2015	O
,	O
GitHub	B-Application
reported	O
that	O
approximately	O
102,000	O
of	O
their	O
5.1	O
million	O
licensed	O
projects	O
(	O
2%	O
of	O
licensed	O
projects	O
on	O
GitHub.com	B-Application
)	O
used	O
the	B-License
Unlicense	I-License
.	O
</s>
<s>
Until	O
2022	O
,	O
the	O
Fedora	O
Project	O
recommended	O
CC0	O
over	O
the	B-License
Unlicense	I-License
because	O
the	O
former	O
is	O
"	O
a	O
more	O
comprehensive	O
legal	O
text	O
"	O
.	O
</s>
