- Core Subsystem
    - Hotplug
    - Schedule
    - Power Management
    - Debugging
    - Virtualization
    - Containerization
    - Swap
    - Filesystem
    - Networking
    - Logging & Tracing
    - Cgroup
    - Hugepage

- Kernel Mechanisms
    - Tracing
    - Isolation Mechanisms
    - Namespaces

- Security Features
    - Access Control
    - Integrity & Verification
    - Sandboxing & Isolation
    - Cryptography

- Hardware Support
    - CPU Support
    - GPU & Display Support
    - Storage Support
    - Network Adapters Support
    - Peripheral Support
    - Multimedia Support
    - Embedded & SoC Support
    - Power & Thermal Management

- Performance
    - CPU Optimization
    - Memory Optimization
    - Disk Optimization
    - Network Optimization
    - Latency Optimization
    - Energy Efficiency Optimization
    - Real-Time Optimization
    - I/O Optimization

- Build & Boot
    - Bootloader Support
    - Initramfs
    - Compression

- Compatibility
    - Legacy Support
    - POSIX Compliance