Symbols function is a transfer information without spoken or written words. Symbols is an “alphabet of human thought”. avoid of educational or language barriers.
Pictograms: The pictogram is a part of symbols. A pictogram is an image that express an object, or transfer information.
Ideogram: An ideogram or ideograph is a graphic symbol that represents an idea or concept, independent of any particular language, and specific words or phrases.
Trademarks: During the Middle Ages European trade guilds began using marks to identify the origin and content of their products.