Black Hole ○꠹ ❪✺ᵢ❫ Black Hole Concepts ○ ❪✺₁𝑖❫ Classes of Black Holes ○️ ❪✺ᵢ❫ Black Hole Concepts ○ ❪✺₁ᵢ❫ Black Hole Classes ○ Ergosphere ○ Event Horizon ○ Penrose Process ○ ❪✺₁ᵢ❫ Black Hole Classes ○ Astrophysical Jet ○꠹ ❪✺₁𝑖❫ Classes of Black Holes ○️ Intermediate-Mass Black Hole ○꠹ Primordial Black Hole ○꠹ Stellar-Mass Black Hole ○꠹ Supermassive Black Hole ○꠹