ISC licence
| Publisher | Internet Systems Consortium |
|---|---|
| DFSG compatible | Yes |
| FSF approved | Yes |
| OSI approved | Yes |
| GPL compatible | Yes |
| Copyleft | No |
| Linking from code with a different license | Yes |
| Website | www |
The ISC license is a permissive free software license published by the Internet Systems Consortium (ISC). It is functionally equivalent to the simplified BSD and MIT licenses, differing in its removal of language deemed unnecessary following the global adoption of the Berne Convention.
Originally used for ISC software such as BIND and dig, it has since become the preferred license for contributions to OpenBSD and the default license for Node.js packages. The ISC license is also used for Linux wireless drivers contributed to the kernel by Qualcomm Atheros.
The original ISC license is as follows:
According to the Free Software Foundation, OpenBSD updated the ISC license to remove the ambiguous term "and/or." The license text is as follows:
Paul Vixie stated on the BIND mailing list that the ISC license used the term "and/or" to avoid controversy similar to the events surrounding the University of Washington's refusal to allow distribution of the Pine email software. However, Theo de Raadt chose to retain the wording originally used by the University of California at Berkeley, which allowed free redistribution in either commercial or open source software. Both licenses are considered acceptable by the Free Software Foundation, and compatible with the GNU GPL.
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