I dunno... phonebooks we're sorted alphabetically before they were created with computers. That's a single sorted list and not a set of categories. The card sorting is interesting but it seems like the word is simply used in multiple ways.
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Phonebooks are in alphabetical order. They are sorted into residential and business (white and yellow), then further sorted into business categories (or in some cases residential areas), and then ordered.
Yellow pages where sorted by category at least here in Germany.