If a bar code or magnetic readout code were printed on the spine of a book at a standard point on the spine, a reader that would be preset for a specific title by typing in the title on a mini-keyboard on the reader would beep when the title appeared as the reader was quickly dragged across the spines of books on a shelf. A title writer could manufacture small adhesive labels to be adhered to books as they were purchased and placed on the shelf. This could save much time in locating a book in a library.Key numbers (as in the Dewey Decimal System) referenced to a catalog might be more practical than typing in an entire title.

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