[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] VCRs as dancing bearware 2nd 3rd viability vialbility versus capability violins, cognitive friction of visual design 2nd 3rd 4th visual design language (Xerox) vocabulary specifying 2nd 3rd versus source code |