- ❪✺₁𝑖❫⁺ Classes of File Systems ○
- ❪✺₁ᵢ₍₀₎❫ Operating System Class Corridors ○
- ❪✺₁ᵢ₀❫ Operating System Class Portals ○
- Access Token ○꠹
- Access-Control List (ACL) ○꠹
- Application Binary Interface (ABI) ○꠹
- Command-Line Interface (CLI) ○꠹
- Driver ○꠹
- Event ○꠹ꟲᴼᴹᴾ
- File System ○꠹
- Graphical User Interface (GUI) ○꠹
- Kernel ○꠹ᴼˢ
- Lock ○꠹
- Process ○꠹
- Shell ○꠹
- Symbolic Link ○꠹
- System Call (syscall) ○꠹
- System Resource ○꠹
- Thread ○꠹