Which famous dictionary brand was the first to introduce a thumb index design feature to help users quickly find words by letter?

The evolution of dictionaries represents one of the most significant product innovations in linguistic history. These reference tools have transformed from massive tomes to sophisticated digital platforms, changing how we access and understand language. This poll tests your knowledge about a famous dictionary brand that revolutionized the industry with its innovative product design and accessibility features.

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Merriam-Webster
Oxford University Press
Collins
Cambridge University Press