這陣子因為 Microsoft 決定將 Microsoft Permissive License 送交 Open Source Initiative 審查而又引起風波。(Slashdot 這篇：Microsoft's New Permissive License Meets Opposition)
Microsoft Permissive License 相當開放而且自由，同時條款又相當的簡單。這個 license 要做的事情差不多就是 BSD license + 專利授權條款，也就是這段所提到的：
(B) Patent Grant- Subject to the terms of this license, including the license conditions and limitations in section 3, each contributor grants you a non-exclusive, worldwide, royalty-free license under its licensed patents to make, have made, use, sell, offer for sale, import, and/or otherwise dispose of its contribution in the software or derivative works of the contribution in the software.
相較於 GPL 3.0 自以為自由的條款來說，這份授權條款對我比較有吸引力。