↩ 🔵 🔵 🔵 ❪✺❫ Electrical Engineering Concepts ○ ❪✺❫ Metrological Concepts ○ Instrumentation ○𓆪 ❪✺₁❫ Instrumentational Classes ○ ❪✺-❫ Floating Concepts — Instrumentation ○ Photon Counting ○