The Arabian writing were impost in all countries converted to the Islamism religion, it come from the Nabataens writing and have the same common trunk of the Palmirian and Estrangelo alphabet. The Arabian alphabet changed in different forms, according to the epochs and places; we distinguish two main groups. The Arabian from Cufa, writing reserved to inscriptions and to Alcoran copies destined to liturgical practice. The Arabian from Neskhi, round writing from the classical epoch, having two main forms; the oriental Arabian and the Arabian from Magreb. This kind of writing is done from the write to the left, being most part of the letters tied one to another. Each letter reveals four slightly different forms of connection to a unique common type (isolated, initial, medium and final), according to its position in the word.