(mathematics, somewhat derogatory) Using symbol pushing; solving mathematical problems by manipulating symbols (as in algebra) rather than through visual or intuitive understanding.

A language using symbols, such as hieroglyphs. / A form of shorthand in scientific or mathematic calculations.

(programming) An identifier that is substituted by a pre-defined value prior to compilation.

A unique series of letters assigned to a company or other security for trading purposes.

(computing theory) A symbol in a formal grammar that cannot appear in sentences of the grammar but may eventually be resolved into a sequence of terminal symbols.