<s>
The	O
ISC	B-License
license	I-License
is	O
a	O
permissive	B-License
free	I-License
software	I-License
license	I-License
published	O
by	O
the	O
Internet	O
Software	O
Consortium	O
,	O
now	O
called	O
Internet	O
Systems	O
Consortium	O
(	O
ISC	O
)	O
.	O
</s>
<s>
It	O
is	O
functionally	O
equivalent	O
to	O
the	O
simplified	O
BSD	O
and	O
MIT	B-License
licenses	I-License
,	O
but	O
without	O
language	O
deemed	O
unnecessary	O
following	O
the	O
Berne	O
Convention	O
.	O
</s>
<s>
Originally	O
used	O
for	O
ISC	O
software	O
such	O
as	O
BIND	B-Protocol
and	O
dig	B-Protocol
,	O
it	O
has	O
become	O
the	O
preferred	O
license	O
for	O
contributions	O
to	O
OpenBSD	B-Operating_System
and	O
the	O
default	O
license	O
for	O
npm	B-Language
packages	O
.	O
</s>
<s>
The	O
ISC	B-License
license	I-License
is	O
also	O
used	O
for	O
Linux	B-Operating_System
wireless	O
drivers	O
contributed	O
by	O
Qualcomm	O
Atheros	O
.	O
</s>
<s>
Paul	O
Vixie	O
stated	O
on	O
the	O
BIND	B-Protocol
mailing	O
list	O
that	O
the	O
ISC	B-License
license	I-License
started	O
using	O
the	O
term	O
"	O
and/or	O
"	O
to	O
avoid	O
controversy	O
similar	O
to	O
the	O
events	O
surrounding	O
the	O
University	O
of	O
Washington	O
's	O
refusal	O
to	O
allow	O
distribution	O
of	O
the	O
Pine	B-Operating_System
email	O
software	O
.	O
</s>
<s>
The	O
OpenBSD	B-Operating_System
project	I-Operating_System
began	O
using	O
the	O
ISC	B-License
license	I-License
in	O
2003	O
,	O
before	O
ISC	O
added	O
the	O
term	O
"	O
and/or	O
"	O
.	O
</s>
<s>
Theo	O
de	O
Raadt	O
of	O
OpenBSD	B-Operating_System
chose	O
to	O
retain	O
the	O
wording	O
originally	O
used	O
by	O
the	O
University	O
of	O
California	O
,	O
Berkeley	O
,	O
which	O
allowed	O
free	O
redistribution	O
in	O
either	O
non-free	O
or	O
open-source	B-Application
software	I-Application
.	O
</s>
<s>
Both	O
licenses	O
are	O
by	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
,	O
and	O
compatible	O
with	O
the	O
GNU	B-License
GPL	I-License
.	O
</s>
<s>
In	O
2015	O
,	O
ISC	O
announced	O
they	O
would	O
release	O
their	O
Kea	O
DHCP	O
Software	O
under	O
the	O
Mozilla	B-License
Public	I-License
License	I-License
2.0	I-License
,	O
stating	O
,	O
"	O
There	O
is	O
no	O
longer	O
a	O
good	O
reason	O
for	O
ISC	O
to	O
have	O
its	O
own	O
license	O
,	O
separate	O
from	O
everything	O
else	O
"	O
.	O
</s>
<s>
Throughout	O
the	O
following	O
years	O
,	O
they	O
re-licensed	O
all	O
ISC-hosted	O
software	O
,	O
including	O
BIND	B-Protocol
in	O
2016	O
and	O
ISC	O
DHCP	O
Server	O
in	O
2017	O
.	O
</s>
<s>
The	O
Publications	O
Office	O
of	O
the	O
European	O
Union	O
advises	O
using	O
the	B-License
MIT	I-License
license	I-License
instead	O
of	O
the	O
ISC	B-License
License	I-License
in	O
order	O
to	O
reduce	O
license	B-License
proliferation	I-License
.	O
</s>
<s>
The	B-Application
GNU	I-Application
project	I-Application
states	O
the	O
inclusion	O
of	O
"	O
and/or	O
"	O
still	O
allows	O
the	O
license	O
to	O
be	O
interpreted	O
as	O
prohibiting	O
distribution	O
of	O
modified	O
versions	O
.	O
</s>
