Notation refers to a system of symbols and signs used to represent information, concepts, or instructions in a clear and concise manner. It is commonly used in various fields such as mathematics, music, and science to convey complex ideas efficiently. For example, in mathematics, notation includes symbols like "+" for addition and "π" for the ratio of a circle's circumference to its diameter. In music, notation consists of symbols that indicate pitch, rhythm, and dynamics, allowing musicians to read and perform compositions accurately. Different types of notation exist, such as musical notation for music and chemical notation for representing chemical compounds. Each system serves to simplify communication within its respective discipline.