The Greek alphabet has been used since century BC. It was mostly derived from the earlier Phoenician alphabets and was the first alphabetic script to have distinct letters for vowels as well as consonants.
Let me hear you say GO GREEK. Let me hear you say GO GREEK. Let me hear you say alpha beta gamma delta epsilon zeta eta theta iota kappa lambda mu nu xi omicron pi rho sigma tau upsilon PHI CHI PSI OMEGA!