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What's the difference between 復帰{ふっき}, 復元{ふくげん} and 復旧{ふっきゅう}?

The both seem to mean restore. (I generally use these words in a computer
context as in restoring files or settings.

Related: [Difference between 回復, 修復, 復旧 and
復興](https://japanese.stackexchange.com/questions/19603/difference-
between-%E5%9B%9E%E5%BE%A9-%E3%81%8B%E3%81%84%E3%81%B5%E3%81%8F-%E4%BF%AE%E5%BE%A9-%E3%81%97%E3%82%85%E3%81%86%E3%81%B5%E3%81%8F-%E5%BE%A9%E6%97%A7-%E3%81%B5%E3%81%A3%E3%81%8D%E3%82%85%E3%81%86-and-%E5%BE%A9%E8%88%88-%E3%81%B5%E3%81%A3%E3%81%93%E3%81%86)
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2015-05-15T04:40:23.803
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2017-04-13T12:43:43.857
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meaning usage
What's the difference between 復帰, 復元 and 復旧
**復帰** ( _intransitive_ )

It originally means "back to original location/position", then figuratively
refers to "back to work". This word doesn't imply at all the subject was once
out of order: you put your PC in sleep mode, then press the power button, the
machine will 復帰する.

**復元** ( _transitive_ or _intransitive_ )

This word put stress on "to reproduce the original shape". It may or may not
indicate it was malfunctioning before you 復元, but if you do 復元, it must look
like what it had been like. The "system restore" of Windows is translated as
システムの復元.

**復旧** ( _transitive_ or _intransitive_ )

It means "regain original function, which was disrupted by an unexpected
incident". This one explicitly tells that it won't work if you don't 復旧. It
focuses on function, so if you データを復旧する, the data should be as it was, but if
パソコンを復旧する you're not guaranteed that data stored in your PC was saved too.
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2015-05-15T06:51:44.770
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