Aha Trivia Stuff Everyone Should Know
Aha Trivia: Stuff Everyone Should Know · ahatrivia.com/mb-reading-02d9e9548e14

What did Ezra Abbot design to keep catalog cards in order?

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  1. A locked metal box
  2. A string tied around the cards
  3. Cards on edge between two wooden blocks

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References

  1. Library catalog en.wikipedia.org/wiki/Library_catalog Checked 2026-11-07.

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