CHI is an annual conference, for the global HCI community, where researchers and practitioners gather from across the world to discuss the latest in interactive technology. Our theme encourages authors and delegates to make waves as they feature the latest discoveries and advances in HCI and shake up the existing state of affairs. And to think of CHI as a platform to combine strengths of different people from different perspectives. This gives rise to our CHI 2021 theme "Making Waves, Combining Strengths".