This issue of the journal on Complex Systems Informatics and Modeling Quarterly contains publications that present extended papers from the workshops of the 18th International Conference on Perspectives in Business Informatics Research (BIR 2019), organised in Katowice, Poland, 23-25 September 2019. The theme of the conference was Responsibilities of Digitalisation – Responsible Designing and Shaping the Future of Technology for Digital Preservation, Global Data Storage and Cost-Effective Management. The BIR 2019 workshops captured important and novel topics on security analytics, managed complexity, and information logistics and digital transformation. In this issue we also include one paper from the main BIR conference.