The Zeta is an association between the Braille language (language of people with defined-visual science), the conventional form of the alphabet and cellular technology. With a direct association with the shape of the letter grid of numbers on your phone, you can see the combinations of each digit.
To illustrate further, imagine the letter "A", see that it has two points lower, and begin to draw it in section 7 (zeta grid) and end up in Section 9, and the letter A is aa sequence of numbers (7 , 9)
Now imagine the letter "C" check points that she has two sides, and begin to draw it in section 3 (grid zeta) and end up in Section 9, and the letter C is the sequence of numbers (3.9).
This facilitated the understanding of language for both the visually impaired and for people who are visually impaired, and is a method common to all people who see.
In our project the numerals are represented by them as they are in the grid. That is, over a period of time, if you enter: just once, have the corresponding number, twice, a letter of the alphabet, special characters or accents used more, and three times, other characters.