In computing, a file or data structure that records backspace operations, used in undo systems or keystroke logging.
Compound of 'backspace' and 'file.' Technical neologism from computer science and software engineering, not yet standardized in major dictionaries.
Your computer's 'undo' function actually works partly through backspacefiles—they track every keystroke and deletion so you can reverse your edits, which is why accidental deletions aren't actually permanent!
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