Topic Prevalence Across 12 Years

How Apple's session topics rose, fell, and reorganized from WWDC 2014 to 2025. Click any topic to see its year-by-year story.

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Heat Grid: Topics × Years

Each cell is the number of sessions for that topic in that year. Click a row to drill in.

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Small Multiples: One Mini-Chart Per Topic

Compare the trajectory of every topic at a glance. Click any to drill in.