It may also be written as ``symbol'' in that it represents the range of meanings that a capital letter ``SYMBOL'' can contain. If something that can be called a symbol, for example, an ``icon'' indicates an object through similarity and an ``index'' physically and directly indicates an object, then a ``symbol'' is based on some system shared among people. It was used to point to things. Therefore, different symbol systems can show different meanings even if they look the same. Thus 'symbols' have a range of meanings.
