It's free software with a liberal open source license.

它是自由软件，有一个自由的开放源码许可。

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A licensor can provide the software under more than one license, perhaps one that is open source and one that's proprietary.

许可方可以在多个许可下提供软件，也许有一个许可是开放源码的，有一个是专有的。

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This open source license allows the source code to be used and modified for use in other software, so long as the copyright notice and disclaimer are preserved.

这个开源许可允许在其他软件中使用这些源代码，并根据需要进行修改，但前提是遵从版权需知和免责声明。

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It is calculated using the same blend of prices by which IDC determines the average software unit price, including: retail, volume license, OEM, free, open-source, etc.

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