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自由知识文化日历/8月26日
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由开放世界中的开放书籍 Wikibooks 提供
1997 年的今天，布鲁斯·佩伦斯宣布了早期的开放硬件计划
“开放硬件认证计划”
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书籍：自由知识文化日历
华夏公益教科书
