The modern Greek alphabet has 24 letters. It is used to write the Greek language. The Greek alphabet is also frequently used in science and mathematics to represent various values or variables. Most letters in the Greek alphabet have an equivalent in the English language. The twenty-four letters (each in uppercase and lowercase forms) are:
Greek has been spoken in the Balkan peninsula since around the 3rd millennium BC, or possibly earlier. The earliest written evidence is a Linear B clay tablet found in Messenia that dates to between 1450 and 1350 BC, making Greek the world's oldest recorded living language.
Greek alphabet, script used to write the Greek language; Greek Orthodox Church, several Churches of the Eastern Orthodox Church; Ancient Greece, the ancient civilization before the end of Antiquity; Old Greek, the language as spoken from Late Antiquity to around 1500 AD; Other uses. Greek, 1980 play by Steven Berkoff
The earliest alphabet-related system of numerals used with the Greek letters was a set of the acrophonic Attic numerals, operating much like Roman numerals (which derived from this scheme), with the following formula: Ι = 1, Π = 5, Δ = 10, ΠΔ = 50, Η = 100, ΠΗ = 500, Χ = 1000, ΠΧ = 5000, Μ = 10000 and ΠΜ = 50000.