all the letters of the word "Talmud") is found; the gematria of the resulting string is then calculated.The same author also used sums of all possible unique letter combinations, which add up to the value of a given letter.
A few instances of gematria in Arabic, Spanish and Greek, spelled with the Hebrew letters, are mentioned in the works of Rabbi Abraham Abulafia; However, the primary language for gematria calculations has always been and remains Hebrew and, to a lesser degree, Aramaic.
A well-known example of Hebrew gematria is the word chai ("alive"), which is composed of two letters that (using the assignments in the Mispar gadol table shown below) add up to 18.
This has made 18 a "lucky number" among the Jewish people.
Rabbi David ha-Levi's methods take into consideration the numerical values and other properties of the vowels as well.
Kabbalistic astrology uses some specific methods to determine the astrological influences on a particular person.
Similar systems, some of which were derived from or inspired by Hebrew gematria, have been used in other languages and cultures, i.e.