a system of graphic symbols for a specialized use, other than ordinary writing

musical notation.

the process or method of noting or setting down by means of a special system of signs or symbols.

the act of noting, marking, or setting down in writing.

a note, jotting, or record; annotation

notations in the margin.

noun

characters , chit , code , documentation , figures , jotting , memo , memorandum , note , noting , record , representation , script , signs , symbols , system , annotation , entry , marking