A marker or indicator that identifies the location or boundaries of a file, especially in computing or data storage.
Compound from 'file' (Old English 'feol', meaning a tool) + 'mark' (Old English 'mearc', meaning 'sign' or 'boundary'). In computing, it refers to metadata that flags file locations.
Filemarks are like invisible bookmarks in computer storage—they help the system know where one file ends and another begins, preventing your cat photos from getting mixed up with your homework!
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