↩ 🔵 🔵 🔵 ❪✺₀❫ Portals ○ Systems Theory 𓆩⚪𓆪 ❪✺❫ Network Concepts ○ ❪✺ᵢ❫ State Concepts ○ ❪✺₁❫ System Classes ○ ❪✺₂❫ System Domains ○ ❪✺₃❫ System Particulars ○ ❪✺₄❫ System Sets ○ ❪✺_❫ System Subs ○ Feedback ○ Scalability ○ State ○ System ⚪