Just googled 000 and up popped the Dewy Decimal System............
000 – General works, Computer science and Information
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Just looked again and there are apparently a book and an album called Zero Zero Zero but both are by people I've never heard of and 000 is a fine grade of flour, but the system may be an American grading one and so again people over here wouldn't have a clue :?
Bu - The element of surprise.