and sponsored by several companies, including Telefónica Alpha (now Kora Health), Amalfi Analytics, LumenAI and Pre-dictAssistance. This was the latest of a series of biannual international conferences that started as WSOM in Helsinki, Finland, back in 1997, under the intellectual inspiration of Prof. Teuvo Kohonen, with a focus on Self-Organizing Maps. In its 12th edition, it extended its scope to cover the more general domains of unsupervised learning and data visualization.WSOM ? 2019 included talks by renowned keynote speakers including professors Paulo J.