Which innovative feature did Oxford Dictionaries introduce in 2014 that fundamentally changed how new words enter their digital product compared to traditional print dictionaries?

The transition from print to digital dictionaries represents one of the most significant product evolutions in linguistic tools. This shift fundamentally changed how we access language information and learn new vocabulary. Digital dictionaries introduced features impossible in print versions - from pronunciation audio to real-time updates reflecting evolving language. Test your knowledge about this transformative product category that revolutionized language learning and reference.

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Quarterly update schedule allowing new words to be added four times per year rather than waiting for new print editions
Crowd-sourced voting system where users could suggest and vote on new words for inclusion
AI-powered system that automatically detected and added new words based on internet usage frequency
Subscription model where premium users gained early access to newly added vocabulary before general release