Rapidmath.com and Wikipedia.com both publish information about Greek letters and symbols, including complete Greek alphabet tables. Scientific and mathematics functions often use Greek symbols and letters.
The Greek alphabet, utilized since the 8th century, consists of 24 characters beginning with Alpha and ending with Omega. Based off the earlier Phoenician alphabet, the Greek alphabet is the first alphabet to contain distinctive letters for both vowels and consonants. The modern Greek alphabet distinguishes between uppercase and lowercase letters, whereas the original Greek alphabet did not. College sororities and fraternities commonly use Greek letters in their names. Academic fields, including math and science, also often use the Greek alphabet.