MIT许可证（The MIT License）是许多软件授权条款中，被广泛使用的其中一种。与其他常见的软件授权条款（如GPL、LGPL、BSD）相比，MIT是相对宽松的软件授权条款。

简介

MIT许可证之名源自麻省理工学院（Massachusetts Institute of Technology, MIT），又称“X条款”（X License）或“X11条款”（X11 License） MIT内容与三条款BSD许可证（3-clause BSD license）内容颇为近似，但是赋予软件被授权人更大的权利与更少的限制。 运用情形

有许多团体均采用MIT许可证。例如著名的ssh连接软件PuTTY与X Windows System (X11)即为例子。Expat, Mono开发平台库，Ruby on Rails, Lua 5.0 onwards等等也都采用MIT授权条款。 条款内容

原文

Copyright (C) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.[2] 被授权人权利

被授权人有权利使用、复制、修改、合并、出版发行、散布、再授权及贩售软件及软件的副本。 被授权人可根据程序的需要修改授权条款为适当的内容。 被授权人义务

在软件和软件的所有副本中都必须包含版权声明和许可声明。 其他重要特性

此授权条款并非属copyleft的自由软件授权条款，允许在自由/开放源码软件或非自由软件（proprietary software）所使用。 MIT的内容可依照程序著作权者的需求更改内容。此亦为MIT与BSD（The BSD license, 3-clause BSD license）本质上不同处。 MIT条款可与其他授权条款并存。另外，MIT条款也是自由软件基金会（FSF）所认可的自由软件授权条款，与GPL兼容。 MI协议模板

The MIT License (MIT)

Copyright © 2017

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.