還原本意係返原處，亦指人、事，去返到原本狀態。
還原可以係指：
- 還原工序
- 資本還原值，英文capitalised value
- 資料還原，資料回復返之前備份狀態
- 系統還原，操作系統回復到上次記錄狀態
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