Which dictionary publisher revolutionized product packaging in 1961 by introducing the first dictionary sold in a slip case with a magnifying glass, drastically changing retail display and consumer appeal?

The publishing industry has seen remarkable innovations in product packaging and marketing strategies over the years. Dictionaries, in particular, have an interesting retail history that reflects changing consumer behaviors and expectations. This trivia question explores a pivotal moment in dictionary marketing that transformed how reference books were sold to the public.

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Merriam-Webster
Oxford University Press
Random House
American Heritage