free content
フリーコンテント
Digital rights
Open source
Free education
Free software movement
Freedom of information
Information wants to be free
Open publishing
Open-source hardware
Project Gutenberg
Knowledge for free – The Emergence of Open Educational Resources. 2007, ISBN 92-64-03174-X.
/suto3/google.icon
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/suto3/Google画像検索.icon
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/suto3/Google定義検索.icon
free content
/suto3/wikipedia.icon
free content
/suto3/weblio.icon
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/suto3/kotobank.icon
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/suto3/jisho.icon
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