Which dictionary brand first transitioned to a subscription-based model for its complete online offering, revolutionizing the language reference business model?

The dictionary and language reference market has seen fascinating brand strategy shifts over the decades as physical reference books transformed into digital products. Behind these trusted linguistic authorities are strategic business decisions that have shaped how we access language resources today. Test your knowledge of the business side of linguistic reference brands!

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Oxford English Dictionary (OUP)
Merriam-Webster
Collins Dictionary (HarperCollins)
Cambridge Dictionary (Cambridge University Press)