[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] & (ampersand) " and &apos entities < and > (angle brackets) 2nd entity references for ' (apostrophe) @* (at-asterisk) $ (dollar sign) // (double forward slashes) < (entity reference) > (entity reference) = (equals sign) / (forward slash) 2nd 3rd -- (hyphens, doubled) 
 vs. 
 (line-end vs.carriage return characters) <? and ?> (PI start and end tags) " (quotes, double) 2nd [See also quotes]3rd ' (quotes, single) 2nd [See also quotes]3rd | (union operator) 2nd |