顺带一提，这两个协议分别来自麻省理工大学和伯克利大学，里面的 MIT 协议是最自由的协议。由于 BSD 原始协议要求派生体在打广告时必须声明原始来源，因此我们通常用更简化的 FreeBSD 协议，同时 BSD 也是商用首选协议。
如 MIT 协议，有：
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