They are Numbers and Geometry. This is key to the distinction of the science of communications and the science of language. Physics also has two subfields. So, we can in a sense, analogize physics with mathematics and say that Numbers are particles of physics and that Geometry is Waves of physics. So, we have particles in physics, and numbers in mathematics and text in communications.
Textual communications is language.
The waves of physics, or the geometry of mathematics is another form of communication, although it is not language communication, rather instead it is visual communication and subjects such as art fall under the visual communication. Our sense of sight takes in the visual communication and processes it. The text communication, or language is taken in by our sense of sight but also our sense of hearing.