WFormal language
WAbstract syntax tree
WAntimatroid
WContext-free grammar
WDyck language
WGesture Description Language
WGrammar systems theory
WIntroduction to Automata Theory, Languages, and Computation
WLL grammar
WLongest repeated substring problem
WMarkup language
WRegular expression
WSet constraint
WString (computer science)
WSubstring
WSymbol (formal)
WSyntax (logic)
WTree (automata theory)
WTuring machine