[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] UML (Unified Modeling Language) origins Unified Modeling Language [See UML] Unix mail system unreadable code use cases diagrams User class user experience user interfaces |