↩ 🔵 🔵 🔵 ❪✺₁ᵢ❫ File Classes ○ ❪✺₁ᵢ❫ Operating System Classes ○ ❪✺ᵢ❫ File System Concepts ○ ❪✺₁𝑖❫⁺ Classes of File Systems ○ ❪◑❫ File Systems ○