- Rare OS for embedded devices and for specific architectures (Elbrus-Baikal-...), realtime and not so much.
- Building Linux distributions.
- File systems and DBMS.
- Virtualization in all forms, from Xen to K8s.
- Devops topics, including CI/CD/TDD.
- Open-source projects - from system utilities to browser extensions and CMS...
- Science: finite state machines, linear algebra, graph algorithms, parallel programming.
- Biology: studies of people using eye trackers and neurotransmitters, biometrics and even healthy eating.
- Education: how and what to teach.
- Philosophy and trends of Open-Source.
Source: opennet.ru