Which innovative product strategy did Oxford Dictionary first implement in 2014 that fundamentally changed how dictionaries were updated?

The publishing industry has unique product challenges, especially for language reference works. Dictionary publishers must balance tradition with innovation as language constantly evolves. This poll explores how Oxford Dictionary adapted its product strategy to changing consumer needs and technological disruption in the digital age, highlighting a pivotal moment in linguistic product history.

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Introduced a subscription-based mobile app with audio pronunciations
Switched to quarterly digital updates instead of annual printed editions
Added crowdsourced word definitions through user submissions
Partnered with social media platforms to track trending slang terms