In this paper, we present research on the analysis of the design space for cybersecurity visualizations in VizSec. At the beginning of this research, we analyzed 17 survey papers in the field of cybersecurity visualization. Based on the analysis of the focus areas in each of these survey papers, we identified five key components of visualization design, i.e. Input Data, Security Tasks, Visual Encoding, Interactivity, and Evaluation. To show how research papers align with these components, we analyzed 60 papers published at the IEEE Symposium on Visualization for Cyber Security (VizSec) between 2016 and 2021 in the context of the five identified components. As a result, each research paper was classified into several categories derived from the selected components of the visualization design. Our contributions are: (i) an analysis of the focus areas in survey papers on cybersecurity visualization and (ii) the classification of 60 research papers in the context of the selected components of the visualization design. Finally, we highlighted the main findings of the analysis and drew conclusions.

Most of today's computer systems, including rapidly emerging embedded ones, rely on an operating system.Consequently, the development of embedded systems and related software often requires a deeper understanding of operating systems.This paper presents a new incrementally built operating system and a learning course formed around it.Each increment builds on the previous one and introduces new system elements, new concepts and solutions, and a new set of assignments for improving or extending operations or simply demonstrating its use.Increments and assignments are designed to extend theoretical and practical knowledge in the operating system domain, give experience with non-trivial software systems and their development tools, familiarize the learner with basic computer hardware components and demonstrate device driver construction.The audience targeted by this operating system and course materials includes advanced students with (basic) knowledge of computer architecture, programming and operating systems.In addition, materials may be used individually as part of a lifelong learning process.