This document discusses Statistics Netherlands' use of open source software. It notes that open source software is driving modern statistics and data science. It describes how Statistics Netherlands uses communities like GitHub and Stack Overflow. It discusses motivations for using open source software, including economic benefits and supporting the community. It highlights Statistics Netherlands' curated list of over 50 open source software packages covering different areas. It provides examples of R packages and Node.js packages contributed by Statistics Netherlands. Finally, it offers tips for contributing to open source software projects.