The Greek alphabet has 24 phonemes represented in a total of 49 symbols, including majuscule and minuscule forms. There is no difference between the letters used to write Ancient and Modern Greek, but some of them are pronounced differently.
The names of the Greek letters include Alpha, Beta, Gamma, Delta and Epsilon. Others include Zeta, Eta, Theta, Iota and Kappa. Lambda, Mu, Nu, Ksi and Omicron are also included, amongst Pi, Rho, Sigma, Tau and Upsilon, as well as Phi, Chi, Psi, and Omega.
The Greek alphabet is one of the oldest alphabets and was the first to use separate letters to indicate vowel sounds. Although it has dwindled in usage over centuries, the Greek language remains important as a source of terminology for scientists, mathematicians, and archaeologists and historians.