↩ 🔵 🔵 🔵 ❪✺_ₛₛ❫ Software Engineering Subsets ○ ❪✺_ₜₛ❫ Engineering Typesets ○ ❪✺_ₜₛ₀❫ Programmatic Typeset Portals ○ ❪𖣐₃’❫ Version Control Systems ○