↩ 🔵 🔵 🔵 ❪✺₄❫ Fortran Sets ○ ❪✺_❫ Fortran Subs ○ ❪✺_ₛₛ₀❫ Programmatic Subset Portals ○ Fortran ○˒ ❪✺_ₜₛ❫ Fortran Typesets ○