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自由知識文化日曆/8月26日
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外觀
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由開放世界中的開放書籍 Wikibooks 提供
1997 年的今天，布魯斯·佩倫斯宣佈了早期的開放硬體計劃
“開放硬體認證計劃”
。
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書籍：自由知識文化日曆
華夏公益教科書
