Which dictionary became the first major language reference work to completely discontinue its print edition in 2012, marking a historic shift to digital-only publishing in the linguistics industry?

In the world of linguistics and language resources, certain product launches have fundamentally changed how we interact with language. One particular dictionary release marked a revolutionary shift in how language resources were delivered to consumers, transforming from traditional print to digital formats and changing the industry forever. Test your knowledge about this pivotal moment in linguistic product history!

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Oxford English Dictionary
Encyclopædia Britannica
Merriam-Webster's Collegiate Dictionary
American Heritage Dictionary