The next meeting of the UK Smalltalk User Group will be on Wednesday, October 28th. Alexandre Bergel will talk about Agile Visualization with Roassal3. Visualizing data is probably the easiest part in the field of data visualization. Numerous books and sophisticated libraries exist for that very purpose. One of challenges of data visualization is to identify the right abstractions that make a visualization reusable, composable, extensible, navigable, and produced at a very low cost. Roassal ( https://github.com/ObjectProfile/Roassal3 ) is a visualization engine for Smalltalk that leverage the experience of crafting and using data visualization. This talk will demo Roassal and presents non-trivial visualizations within the field of software visualization. Alexandre Bergel ( http://bergel.eu/ ) is Associate Professor and researcher at the University of Chile. Alexandre Bergel and his collaborators carry out research in software engineering. His focus is on designing tools and methodologies to improve the overall performance and internal quality of software systems, by employing profiling, visualization, and artificial intelligence techniques. Alexandre Bergel has authored over 140 articles, published in international and peer reviewed scientific forums, including the most competitive conferences and journals in the field of software engineering. Alexandre has participated to over 140 program committees of international events. Alexandre has also a strong interest in applying his research results to industry. Several of his research prototypes have been turned into products and adopted by major companies in the semi-conductor industry and certification of critical software systems. Alexandre is member of the editorial board of Empirical Software Engineering. Alexandre authored the book Agile Artificial Intelligence in Pharo, Agile Visualization ( http://agilevisualization.com/ ), and co-authored the book Deep Into Pharo. Given the current COVID-19 restrictions, this will be an online meeting from home. If you'd like to join us, please sign up in advance on the meeting's Meetup page ( https://www.meetup.com/UKSTUG/events/cbklbrybcnblc/ ) to receive the meeting details. Don’t forget to bring your laptop and drinks!