Soil ( https://github.com/ApptiveGrid/Soil ) is an object oriented database implemented completely in smalltalk/pharo. It makes it easy to build a persistent solution without the burden of mapping everything to some external DSL/database. It supports storing arbitrary graphs and enables transparent access to them. It has binary search indexes to make lookups of huge collections quite efficient. It is the main database behind ApptiveGrid - low code tool to build business processes. ( https://www.apptivegrid.de/) Norbert Hartl ( https://github.com/noha ) is an experienced software engineer and entrepreneur with a strong track record of delivering business projects and developing key libraries and frameworks. As the co-founder of ApptiveGrid and PharoPro, he focuses on creating efficient, zero-dependency software solutions that drive business innovation and streamline operations. This will be an online meeting. If you'd like to join us, please sign up in advance on the meeting's Meetup page ( https://www.meetup.com/ukstug/events/311265917/ ) to receive the meeting details.