The Greek system of numeration developed around 600 BC used symbols to represent amounts in a basic decimal system. Symbols represented individual units from 1 to 4, and letters represented 5, 10, 100 and powers of 10. The Attic system was later replaced by the Ionian system which used all 24 letters of the Greek alphabet to represent numbers, resulting in numbers taking the form of words. This led to the emergence of numerology as a discipline studying the relationship between numbers and words.

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2. The first system of Greek numeration was developed towards the 600 A.C. It was a basic decimal system that used the symbols of the following figure to represent those amounts. So many of them were used as outside necessary according to the principle of the numerations additives. In order to represent the unit and the numbers until the 4 vertical outlines were used. For the 5, the 10 and 100 letters corresponding to the initial of word five (pente), ten (deka) and thousands (khiloi). For this reason it is called to this acrofonic system.

3. The symbols of 50, 500 and 5000 are obtained adding the sign of 10, 100 and 1000 to the one of 5, using a multiplying principle. This attic system was replaced by the Ionian one, that used the 24 letters of the Greek alphabet.

4. Of this form the numbers seem words, since they are made up of letters, and the words have a numerical value as well, is enough to add the numbers that correspond to the letters. It made appear a new luck of magical discipline that studied the relation between the numbers and the words. In some societies like the bean and the Arab, who used a similar system, the study of this relation has had a great importance and has constituted a separate discipline: kabala, that persecutes mystical and divinatory aims