Which dictionary publisher first introduced thumb indexes (the cut-out tabs on dictionary edges) as a product innovation to help users quickly navigate to specific letter sections?

Before online dictionaries and AI language tools transformed how we access linguistic information, traditional dictionary publishers competed fiercely for market dominance through product innovation. This poll tests your knowledge about a pivotal moment in dictionary product design that revolutionized how people interacted with these reference works, making language information more accessible to everyday users.

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Merriam-Webster, in their 1890 International Dictionary
Oxford University Press, in their 1884 first volume of the Oxford English Dictionary
Funk & Wagnalls, in their 1893 Standard Dictionary of the English Language
G. & C. Merriam Company, in their 1864 revision of Webster's American Dictionary