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The nominations so far are captchas and d3. Great projects both. But if those are the _most_ important things academic HCI has produced over the past 20 years, frankly it's not looking good as a field. Other suggestions?https://twitter.com/michael_nielsen/status/963876614286098432 …
I should add Mark Bolas, whose work led to the resurgence in VR. Some of it was done before 1998, but much of the most important stuff was since.
