The word dactylology comes from the Greek ´´ daktilos´´ which is fingers and ´´ logia´´ means ´´ science of the fingers´´ this consists of a communication system that transmits information through the use of the fingers of the hands that It is an auxiliary part of phonology, which is the branch of linguistics that studies the phonemes of sign languages. This can also be used in artificial visual information systems, such as sports referees, military or marine signals, etc. In forms of manual arithmetic calculation that studies the branch of numbers and operations done.

This area has different types of dactylological systems that are conceived, that is to say, create an idea, imagine or think for the numerical count or for the presentation of manual alphabets, musical sounds or encrypted communications, it means when they write in code, in dactylology we can find two types that are, the symbolic and the iconic.

Symbolic dactylology is the symbolization of each different part of the hand or body, when it is pointed out, but if the code is understandable when there is a prejudged or predetermined idea before being aware of it. For example, it can be said that the dactylological alphabet in English, with one of the hands the signaling is with the index finger and with the other hand it means one of the vowel letters of the Latin alphabet.

Iconic dactylology is the one that represents the concepts through the configuration of the hands that seeks to visually imitate the concept itself if it is material or a graphic symbol that deals with the same concept, that means that the code can be understood by without the need for have any idea or teaching, but they can take into account the iconicity of the symbol, when there is a sign, object or the idea that it represents.